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16 wrz 2008 · A simple way to terminate a Python script early is to use the built-in quit() function. There is no need to import any library, and it is efficient and simple. Example: #do stuff if this == that: quit()
Beginner's Python Cheat Sheet - Functions Focuses on functions: how to define a function and how to pass information to a function. Covers positional and keyword arguments, return values, passing lists, using modules, and more
Functional programming is widely used to process data stored in CSV files or JSON files. Since the files could contain a large amount of data, lazy iteration plays an essential role. Data is imported when needed instead of occupying too much memory by loading it all at once.
range([start,] end [,step]) f = open("file.txt","w",encoding="utf8") storing data on disk, and reading it back opening mode on disk 'r' read 'w' write 'a' append …'+' 'x' 'b' 't' encoding of chars for text files: utf8 ascii latin1 … name of file (+path…) file variable for operations f.write("coucou") f.writelines(list of lines) writing ...
def. Defines a new function or class method. def say_hi(): print('hi') if, elif, else. Conditional execution: “if” condition == True? "elif" condition == True? Fallback: else branch. = int(input("ur val:")) if x > 3: print("Big") elif x == 3: print("3") else: print("Small") for, while. # For loop. for i in [0,1,2]: print(i) # While loop does same.
<lock> = Lock/RLock() # RLock can only be released by acquirer. <lock>.acquire() # Waits for the lock to be available. <lock>.release() # Makes the lock available again. Or: with <lock>: # Enters the block by calling acquire() and ...
14 mar 2018 · By default digits, whitespaces and alphanumerics from all alphabets are matched, unless 'flags=re.ASCII' argument is used. Use capital letters for negation. '\d' == ' [0-9]'# Digit'\s' == ' [ \t\n\r\f\v]'# Whitespace'\w' == ' [a-zA-Z0-9_]'# Alphanumeric.
