Reading inputs written in different lines from a file and storing each input inside a list
print list(open("my_text.txt")) is probably a pretty easy way to do it ... ofc people are gonna come screaming about dangling pointers so for the sake of good habits with open("my_text.txt") as f: print list(f) alternatively f.readlines() you might need to strip off some newline characters [line.strip() for line in f]...
Operational error while using stripe with profile app
django,python-2.7,django-templates,stripe-payments
It's kind of weird. But when I followed "No Such Table error" and tested DB it was still empty. So this time I deleted DB but also migrations. Problem is fixed and its just working fine.
How can I resolve my variable's unexpected output?
Remove the comma on your first line of code, this turns it into a tuple optional_message = form.cleaned_data['optional_message'], should be optional_message = form.cleaned_data['optional_message'] ...
random.randint not generating random values
You seem to be confused between defining a function and calling it and how parameters work. def blackjack(A,B): print "Welcome to Blackjack!" print "Your cards are",name[A-1],"&",name[B-1] total = value[A-1] + value[B-1] print "Your card total is",total In your function A and B are place holders. They will be replaced by...
Python: matplotlib - probability mass function as histogram
python,python-2.7,matplotlib,plot,histogram
As far as I know, matplotlib does not have this function built-in. However, it is easy enough to replicate import numpy as np heights,bins = np.histogram(data,bins=50) heights = heights/sum(heights) plt.bar(bins[:-1],heights,width=(max(bins) - min(bins))/len(bins), color="blue", alpha=0.5) Edit: Here is another approach from a similar question: weights = np.ones_like(data)/len(data) plt.hist(data, bins=50, weights=weights, color="blue",...
How to skip a function
If I you're asking what I think you're asking, then yes. In fact, that's the whole point. Functions are sections of reusable code that you define first (they don't run when they're defined!) and then you call that function later. For example, you can define a function, helloworld like this:...
Using OR operator in NumPy Array to Append multiple items
Instead of doing the "OR" inside the append, you'll need to do an if statement: if category == 'bulky item': items.append((Address, x, y, x, y, ReasonCode, SRNumber, SRNumber, FullName, ResolutionCode, HomePhone, CreatedDate, UpdatedDate, BulkyItemInfo, k_bulky_comm, ServiceDate, CYLA_DISTRICT, SCCatDesc, # ServiceNotes, Prior_Resolution_Code, CYLA_DISTRICT, )) elif category == 'e-waste': items.append((Address, x, y,...
lookbehind for start of string or a character
regex,python-2.7,regex-lookarounds
re.compile(ur"(?:^|(?<=[, ]))(?:next to|near|beside|opp).+?(?=,|$)", re.IGNORECASE) You can club 3 conditions using [] and |.See demo. https://regex101.com/r/vA8cB3/2#python...
Import on class instanciation
It is possible to import a module at instantiation: class SpecificClassThatNeedRandomModule(object): def __init__(self): import randomModule self.random = randomModule.Random() However, this is a bad practice because it makes it hard to know when the import is done. You might want to modify your module so that it doesn't raise an exception,...
Adding time/duration from CSV file
python,python-2.7,csv,datetime
Use datetime.timedelta() objects to model the durations, and pass in the 3 components as seconds, minutes and hours. Parse your file with the csv module; no point in re-inventing the character-separated-values-parsing wheel here. Use a dictionary to track In and Out values per user; using a collections.defaultdict() object will make...
django-admin startproject not working with python3 on OS X
python,django,osx,python-2.7,python-3.x
Recommended: Try using virtualenv and initiate your environment with Python3. Or a quicker solution is to use python interpreter directly to execute django-admin: <path-to-python3>/python /usr/local/bin/django-admin startproject mysite ...
Sort List of Numbers according to Custom Number Sequence
This matches your input/output examples, but I had to use descending numbers to get the example answers. Are you sure your explanation is correct? If not, just use 0123456789 instead of 9876543210 in the code below. The algorithm is to provide a sorting key based on translating the digits of...
Open a file from user input in python 2.7
python,python-2.7,user-interface,user-input
The issue is in the lines - selectfile = file(raw_input("Enter Filename: "), 'r') with open(selectfile, 'r') as inF: You need to open the filename (which is inputted from user) directly, as below - with open(raw_input("Enter Filename: "),'r') as inF: Also, there seems to be an indentation issue in your code,...
Python root logger messages not being logged via handler configured with fileConfig
python,python-2.7,logging,configuration-files
A potential problem is that you are importing the module before you set up the logger configuration. That way, the module requests a logger before the logging is setup. Looking a fileConfig()'s documentation, the reason subsequent logging to the pre-obtained loggers fails is the default value for its disable_existing_loggers argument:...
Concatenate a list of series into a uid
python,python-2.7,pandas,py.test
Suppose you want to select columns two and three to add: col_to_add = ['two', 'three'] Use sum(axis=1) to concatenate these columns: df['uid'] = df[col_to_add].sum(axis=1) ...
Pandas Dataframe Complex Calculation
python,python-2.7,pandas,dataframes
I believe the following does what you want: In [24]: df['New_Col'] = df['ActualCitations']/pd.rolling_sum(df['totalPubs'].shift(), window=2) df Out[24]: Year totalPubs ActualCitations New_Col 0 1994 71 191.002034 NaN 1 1995 77 2763.911781 NaN 2 1996 69 2022.374474 13.664692 3 1997 78 3393.094951 23.240376 So the above uses rolling_sum and shift to generate the...
How to check for multiple attributes in a list
You can create a set holding the different IDs and then compare the size of that set to the total number of quests. The difference tells you how many IDs are duplicated. Same for names. Something like this (untested): def test_quests(quests): num_total = len(quests) different_ids = len(set((q.ID for q in...
Update label's text when pressing a button in Kivy for Python
python,python-2.7,button,label,kivy
Well! there was a real need for improvement in your code. (I understand it as you are not experienced.) Improvement: 1 An application can be built if you return a widget on build(), or if you set self.root.(You shouldn't make all of the gui in build function itself.) def build(self):...
Identify that a string could be a datetime object
python,regex,algorithm,python-2.7,datetime
What about fuzzyparsers: Sample inputs: jan 12, 2003 jan 5 2004-3-5 +34 -- 34 days in the future (relative to todays date) -4 -- 4 days in the past (relative to todays date) Example usage: >>> from fuzzyparsers import parse_date >>> parse_date('jun 17 2010') # my youngest son's birthday datetime.date(2010,...
python - how to properly evaluate a value from a system command
You need to use subprocess.check_output: mycat = int(subprocess.check_output(cmd, shell=True)) ...
python class factory inherit random parent
python,python-2.7,inheritance,factory
In my original answer (which I deleted because it was just plain wrong) I said I would consider doing it like this: class RandomPerson(Person): def __init__(self): rand_person = random.choice((John, Kyle))() self.__dict__ = rand_person.__dict__ This way is an adaptation of the Python Borg idiom; the idea was that everything that matters...
Datastructure choice issue
python,list,python-2.7,data-structures,tuples
Sounds like you're describing a dictionary (dict) # Creating a dict >>> d = {'Date': "12.6.15", 'FilePath': "C:\somewhere\only\we\know"} # Accessing a value based on a key >>> d['Date'] '12.6.15' # Changing the value associated with that key >>> d['Date'] = '12.15.15' # Displaying the representation of the updated dict >>>...
List of tuples from (a, all b) to (b, all a)
You can use collections.defaultdict: tups = [ ('a1',['b1','b2','b3']), ('a2',['b2']), ('a3',['b1','b2']) ] d = collections.defaultdict(list) for a, bs in tups: for b in bs: d[b].append(a) Then: >>> d.items() [('b1', ['a1', 'a3']), ('b2', ['a1', 'a2', 'a3']), ('b3', ['a1'])] ...
'NoneType' object is not iterable - looping w/returned value
prog is returning None. The error you get is when you try to unpack the result into the tuple (s, best) You need to fix your logic so that prog is guaranteed to not return None. It will return None if your code never executes the else clause in the...
Who calls the metaclass
You can find the answer relatively easily. First, lets find the opcode for building a class. >>> def f(): class A(object): __metaclass__ = type >>> import dis >>> dis.dis(f) 2 0 LOAD_CONST 1 ('A') 3 LOAD_GLOBAL 0 (object) 6 BUILD_TUPLE 1 9 LOAD_CONST 2 (<code object A at 0000000001EBDA30, file...
Why does `for lst in lst:` work? [duplicate]
In Python, when you say for identifier in iterable: first an iterator will be created from the iterable. So, the actual object will not be used in the looping. Then the iterator will be iterated and the current value will be bound to the name identifier. Quoting the official documentation...
Strange Behavior: Floating Point Error after Appending to List
Short answer: your correct doesn't work. Long answer: The binary floating-point formats in ubiquitous use in modern computers and programming languages cannot represent most numbers like 0.1, just like no terminating decimal representation can represent 1/3. Instead, when you write 0.1 in your source code, Python automatically translates this to...
Appending lines for existing file in python [duplicate]
The issue is in the code - curr_file = open('myfile',w) curr_file.write('hello world') curr_file.close() The second argument should be a string, which indicates the mode in which the file should be openned, you should use a which indicates append . curr_file = open('myfile','a') curr_file.write('hello world') curr_file.close() w mode indicates write ,...
Keep strings that occur N times or more
[s for s, c in counts.iteritems() if c >= 2] # => ['a', 'c', 'b'] ...
Python code not executing in order? MySQLdb UPDATE commits in unexpected order
python,python-2.7,threadpool,mysql-python
A finally clause is guaranteed to execute, even if the try clause raises an exception. What is probably happening here is that an exception is being raised, preventing the update from being committed, but the threads are triggered anyway. This doesn't really seen to be an appropriate use of try/finally....
How to collect data from text file to dict in Python?
python,python-2.7,csv,dictionary
I think I understand the table that you have, but if the following does not work let me know. I have tried to make this code as generic as possible (i.e. reading in the header line and not assuming 4 bases as header so this could work for say a...
summing string and integers in list in python
You need: total = value[c1-1]+value[c2-1] ...
monosubstitution cypher : decryption in python 2.7 list trouble
There are two problems that I have noticed: In encrypt function: elif char == 'U': encrypted_message.append(key[20]) elif char == 'U': encrypted_message.append(key[21]) Change it to: elif char == 'U': encrypted_message.append(key[20]) elif char == 'V': encrypted_message.append(key[21]) In decrypt function: Doing decrypted_message = decrypted_message.replace(key[i], alphabet[i]) for i in range(0,25), this might replace the...
Iterate over all links/sub-links with Scrapy run from script
python,windows,python-2.7,web-scraping,scrapy
Your spider is being blocked from visiting pages after the start page by your allowed_domains specification. The value should include just the domain, not the protocol. Try allowed_domains = ["www.WebStore.com"] Also the line desc_out = Join() in your WebStoreItemLoader definition may give an error as you have no desc field....
Installing Python to a home directory
It is possible to install any Python version assuming your server has a compiler (GCC) installed you can use. Download Python source code here. Apply basic UNIX command knowledge to download and extract Gzip archive to a folder inside your home holder. Follow instructions to compile Python. Please note that...
Python: Terminate subprocess = Success, but it's still running (?)
Two processes are created because you call Popen with shell=True. It looks like the only reason you need to use a shell is so you make use of the file association with the interpreter. To resolve your issue you could also try: from subprocess Popen, PIPE, STDOUT pyTivoPath = "c:\pyTivo\pyTivo.py"...
iterate using yield of a dictionary of dictionaries
You forgot to recursively yield. for k,d in dict.items(directories): for e in walk_directory_files(d): yield e Note that Python 3.3 adds additional syntax specifically for this: for k,d in dict.items(directories): yield from walk_directory_files(d) # Python 3.3+ only! ...
How to find longest consistent increment in a python list?
One problem (but not the only one) with your code is that you are always adding the elements to the same possible_list, thus the lists in bigger_list are in fact all the same list! Instead, I suggest using [-1] to access the last element of the list of subsequences (i.e....
Return html code of dynamic page using selenium
python,python-2.7,selenium,selenium-webdriver,web-scraping
You need to explicitly wait for the search results to appear before getting the page source: from selenium import webdriver from selenium.webdriver.support.wait import WebDriverWait from selenium.webdriver.common.by import By from selenium.webdriver.support import expected_conditions as EC wd = webdriver.Firefox() wd.get("https://www.leforem.be/particuliers/offres-emploi-recherche-par-criteres.html?exParfullText=&exPar_search_=true& exParGeographyEdi=true") wd.switch_to.frame("cible") wait = WebDriverWait(wd, 10)...
lambda for RDD query with if statement
Maybe filter will help? badRecords = access_logs.filter(lambda log: log.response_code == 404) I think the problem with the way you wrote it is: When using map, you can't drop rows, every row is mapped to some other row. So there is no "pass" and the number of rows will not change....
Python Popen - wait vs communicate vs CalledProcessError
python,python-2.7,error-handling,popen
about the deadlock: It is safe to use stdout=PIPE and wait() together iff you read from the pipe. .communicate() does the reading and calls wait() for you about the memory: if the output can be unlimited then you should not use .communicate() that accumulates all output in memory. what...
Python split by comma delimiter and strip
I think you want this: for line in lines: for value in line.split(','): value = value.strip() Hope it helps....
Compare 2 seperate csv files and write difference to a new csv file - Python 2.7
What do you mean by difference? The answer to that gives you two distinct possibilities. If a row is considered same when all columns are same, then you can get your answer via the following code: import csv f1 = open ("olddata/file1.csv") oldFile1 = csv.reader(f1) oldList1 = [] for row...
multiple iteration of the same list
python,python-2.7,python-3.x,numpy,shapely
Without downloading shapely, I think what you want to do with lists can be replicated with strings (or integers): In [221]: data=['one','two','three'] In [222]: data1=['one','four','two'] In [223]: results=[[],[]] In [224]: for i in data1: if i in data: results[0].append(i) else: results[1].append(i) .....: In [225]: results Out[225]: [['one', 'two'], ['four']] Replace...
Use NamedTemporaryFile to read from stdout via subprocess on Linux
python-2.7,subprocess,temporary-files
Unless stdout=PIPE; p[0] will always be None in your code. To get output of a command as a string, you could use check_output(): #!/usr/bin/env python from subprocess import check_output result = check_output("date") check_output() uses stdout=PIPE and .communicate() internally. To read output from a file, you should call .read() on the...
Issue while sharing semaphore objects between process in parallel python
python,python-2.7,multiprocessing,parallel-python
You're having this issue because you're passing the queue object when you submit the job: job = jobServer.submit(startt,(e,),(),("time", ), globals = globals()) # ^ here Two things to note: The queue is already global. You don't need to pass it as an argument. You can pass the queue as an...
What is the difference between <> and == in python?
The operator "<>" means 'not equal to', and the operator "==" means 'equal to'. The former evaluates to true if two things being compared are not equal, and the latter evaluates to true if two things being compared are equal. http://www.tutorialspoint.com/python/comparison_operators_example.htm...
delete data from mysql table based on multiple conditions
Delete from table_xyz where right(lower(source),4) not in ('.txt','.xls','xlsx') ...
Python initialize strings as variable
#!/usr/bin/python m = 2 k = m*2 calc = "((k+m+46)/2)" result = eval(calc) print result Result 26 ...
from x(defined in program) import y(defined in program) python
python,python-2.7,import,filenames
You can't use a variable for an import statement. from x import y will try to find a module literally called y. In your case, that probably means you want a file in the same directory called y.py. It will then try to find a variable (including, eg, a function...
Slicing a Python OrderedDict
python-2.7,slice,ordereddictionary
The ordered dict in the standard library, doesn't provide that functionality. Even though libraries existed for a few years before collections.OrderedDict that have this functionality (and provide essentially a superset of OrderedDict): voidspace odict and ruamel.ordereddict (I am the author of the latter package, which a reimplementation of odict in...
PySerial client unable to write data
Obviously, /dev/tnt0 is not a serial device, or there is something wrong with that. Otherwise, your code looks valid.
Scrapy running from python script processes only start url
When you override the default parse_start_url for a crawl spider, the method has to yield Requests for the spider to follow, otherwise it can't go anywhere. You are not required to implement this method when subclassing CrawlSpider, and from the rest of your code, it looks like you really don't...
Python do a lookup between 2 dictionaries
Just iterate the keys and values of the first dict and add the values from the second dict corresponding to the same key. mydict = {41100: 'Health Grant', 50050: 'Salaries', 50150: 'Salaries', 50300: 'Salaries'}; mytb = {'': '', 41100: -3450200.40, 50050: 1918593.96, 50150: 97.50, 50300: 8570.80} result = {} for...
Is there a way to say for every x values, do this?
If you do lst[<start>:<end>] it would give the elements from <start> index (not value) inclusive, to <end> (end index) exclusive. An example might be able to explain this better - >>> lst = [1,2,3,4,5,6,7,8,9,10] >>> lst[0:5] [1, 2, 3, 4, 5] >>> lst[5:10] [6, 7, 8, 9, 10] Additionally, if...
Scrapy Memory Error (too many requests) Python 2.7
python,django,python-2.7,memory,scrapy
You can process your urls by batch by only queueing up a few at time every time the spider idles. This avoids having a lot of requests queued up in memory. The example below only reads the next batch of urls from your database/file and queues them as requests only...
Python: Non repeating random values from list [duplicate]
python,string,python-2.7,random
you can use random.sample() random.sample(population, k) Return a k length list of unique elements chosen from the population sequence. Used for random sampling without replacement. In [13]: "+".join(random.sample(sentences,3)) Out[13]: 'a+b+c' ...
Data parsing, the pythonic way
What is best depends on how much data you have to process. Half the problem in this case is that the data retrieval and the printing are all jumbled up. Unless you are working with really large amounts of data it is advisable to split them up. If the data...
Why am I getting a (NameError: name 'self' is not defined ) here using Kivy for Python?
python,python-2.7,kivy,self,nameerror
You've mixed tabs and spaces: When you do that, Python gets confused about how things are supposed to be indented, because it doesn't interpret tabs the same way your editor does. Don't mix tabs and spaces; stick to one or the other, and turn on "show whitespace" in your editor...
Identifying the nearest grid point
You can use numpy.searchsorted for this: import numpy as np lat=np.linspace(15,30,61) long=np.linspace(91,102,45) def find_index(x,y): xi=np.searchsorted(lat,x) yi=np.searchsorted(long,y) return xi,yi thisLat, thisLong = find_index(16.3,101.6) print thisLat, thisLong >>> 6, 43 # You can then access the `data` array like so: print data[thisLat,thisLong] NOTE: This will find the index of the lat and...
How to find Unused Security Groups of all AWS Security Groups?
python-2.7,amazon-web-services,amazon-ec2,amazon-s3,boto
This is a slightly difficult request because Security Groups are used by many different resources, including: Amazon EC2 instances Amazon RDS instances VPC Elastic Network Interfaces (ENIs) Amazon Redshift clusters Amazon ElastiCache clusters Amazon Elastic MapReduce clusters Amazon Workspaces ...and most probably other services, too To obtain a list of...
