python Programming Glossary: readWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python several reasons to do so The intention is clear. When you read UpperAttrMetaclass type you know what's going to follow You.. in one class is very useful to make the code easier to read. You can hook on __new__ __init__ and __call__ . Which will..
Difference between __str__ and __repr__ in Python http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python __repr__ goal is to be unambiguous __str__ goal is to be readable Container 䏭 __str__ uses contained objects __repr__ Default.. MyClass 3 and MyClass 3 . The goal of __str__ is to be readable Specifically it is not intended to be unambiguous notice.. it in a way that a user not a programmer would want to read it. Chop off useless digits pretend to be some other class as..
How do I watch a file for changes using Python? http://stackoverflow.com/questions/182197/how-do-i-watch-a-file-for-changes-using-python watch for changes. Each time a change occurrs I'd like to read the new data in to do some processing on it. What's the best.. pywin32 watch share improve this question Have you already looked at the documentation available on http timgolden.me.uk..
Flatten (an irregular) list of lists in Python http://stackoverflow.com/questions/2158395/flatten-an-irregular-list-of-lists-in-python functions can make your example a little easier to read and probably boost the performance. def flatten l for el in..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained come iterables. Iterables When you create a list you can read its items one by one and it's called iteration mylist 1 2 3.. strings files... These iterables are handy because you can read them as much as you wish but you store all the values in memory.. return a huge set of values that you will only need to read once. To master yield you must understand that when you call..
http://stackoverflow.com/questions/261638/how-do-i-protect-python-code aspect is that my employer does not want the code to be read by our customers fearing that the code may be stolen or at least..
Non-blocking read on a subprocess.PIPE in python http://stackoverflow.com/questions/375427/non-blocking-read-on-a-subprocess-pipe-in-python blocking read on a subprocess.PIPE in python I'm using the subprocess module.. stream stdout . I want to be able to execute non blocking reads on its stdout. Is there a way to make .readline non blocking.. non blocking reads on its stdout. Is there a way to make .readline non blocking or to check if there is data on the stream..
What does `if __name__ == “__main__”:` do? http://stackoverflow.com/questions/419163/what-does-if-name-main-do ` do What does the if __name__ __main__ do # Threading example import time thread def myfunction string sleeptime.. if __name__ __main__ do # Threading example import time thread def myfunction string sleeptime lock args while 1 lock.acquire.. time.sleep sleeptime if __name__ __main__ lock thread.allocate_lock thread.start_new_thread myfunction Thread # 1..
Using global variables in a function other than the one that created them http://stackoverflow.com/questions/423379/using-global-variables-in-a-function-other-than-the-one-that-created-them print globvar # No need for global declaration to read value of globvar set_globvar_to_one print_globvar # Prints 1..
Python read a single character from the user http://stackoverflow.com/questions/510357/python-read-a-single-character-from-the-user read a single character from the user Is there a way of reading.. read a single character from the user Is there a way of reading one single character from the user input For instance they.. question Here's a link to a site that says how you can read a single character in both Windows and Linux http code.activestate.com..
Python: Sort a dictionary by value http://stackoverflow.com/questions/613183/python-sort-a-dictionary-by-value Sort a dictionary by value I have a dictionary of values read from 2 fields in a database a string field and a numeric field... keys but how can I sort based on the values Note I have read this post and probably could change my code to have a list of..
What is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python Foo . If it doesn't it will use type to create the class. Read that several times. When you do class Foo Bar pass Python does..
How to remove convexity defects in a Sudoku square? http://stackoverflow.com/questions/10196198/how-to-remove-convexity-defects-in-a-sudoku-square using Python API of OpenCV 2.3.1. Below is what I did Read the image Find the contours Select the one with maximum area..
“Large data” work flows using pandas http://stackoverflow.com/questions/14262433/large-data-work-flows-using-pandas to find a best practice way of performing these steps. Reading links about pandas and pytables it seems that appending a.. you have sure you have pandas at least 0.10.1 installed. Read iterating files chunk by chunk and multiple table queries ... group_map_inverted.update dict f g for f in v 'fields' Reading in the files and creating the storage essentially doing what..
What is the best way to get all the divisors of a number? http://stackoverflow.com/questions/171765/what-is-the-best-way-to-get-all-the-divisors-of-a-number it's not then look for Divisor function on wikipedia. Read the questions and the answer before posting if you do not understand..
Read a file on App Engine with Python? http://stackoverflow.com/questions/2630205/read-a-file-on-app-engine-with-python a file on App Engine with Python Is it possible to open a file..
How does Python's super() work with multiple inheritance? http://stackoverflow.com/questions/3277367/how-does-pythons-super-work-with-multiple-inheritance paths say if First inherited from Second for instance . Read the link above for more details but in a nutshell Python will..
raw_input in python without pressing enter http://stackoverflow.com/questions/3523174/raw-input-in-python-without-pressing-enter way you describe your problem the function msvcrt.getch Read a keypress and return the resulting character. Nothing is echoed..
How can I improve my paw detection? http://stackoverflow.com/questions/4087919/how-can-i-improve-my-paw-detection data except StopIteration break def read_frame infile Reads a frame from the infile. frame_header infile.next .strip .split.. in the previous code example def paw_regions infile # Read in and stack all data together into a 3D array data time for..
Python rounding error with float numbers http://stackoverflow.com/questions/5997027/python-rounding-error-with-float-numbers closest approximation will be less than the actual number. Read What Every Computer Scientist Should Know About Floating Point..
Why is reading lines from stdin much slower in C++ than Python? http://stackoverflow.com/questions/9371238/why-is-reading-lines-from-stdin-much-slower-in-c-than-python delta_sec 0 lines_per_sec int round count delta_sec print Read 0 n lines in 1 n seconds. LPS 2 n .format count delta_sec lines_per_sec.. Crunch speed 618889 cat test_lines . readline_test.py Read 5570000 lines in 1 seconds. LPS 5570000 Thanks in advance Edit.. Saw 5570001 lines in 9 seconds. Crunch speed 618889 Python Read 5 570 000 lines in 1 seconds. LPS 5 570 000 Test run 2 at Mon..
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