Use the fileinput module: import fileinput for line in fileinput.input(): pass fileinput will loop through all the lines in the input specified as file names given in command-line arguments, or the standard input if no arguments are provided. Note: line will contain a trailing newline; to remove it use line.rstrip().
Use os.path.splitext: >>> import os >>> filename, file_extension = os.path.splitext(‘/path/to/somefile.ext’) >>> filename ‘/path/to/somefile’ >>> file_extension ‘.ext’ Unlike most manual string-splitting attempts, os.path.splitext will correctly treat /a/b.c/d as having no extension instead of having extension .c/d, and it will treat .bashrc as having no extension instead of having extension .bashrc: >>> os.path.splitext(‘/a/b.c/d’) (‘/a/b.c/d’, ”) >>> os.path.splitext(‘.bashrc’) … Read more
The original answer below was written in 2008. Since then, Python 3.10 (2021) introduced the match–case statement which provides a first-class implementation of a “switch” for Python. For example: def f(x): match x: case ‘a’: return 1 case ‘b’: return 2 case _: return 0 # 0 is the default case if x is not … Read more
TL;DR: pip install -Iv (i.e. pip install -Iv MySQL_python==1.2.2) What these options mean: -I stands for –ignore-installed which will ignore the installed packages, overwriting them. -v is for verbose. You can combine for even more verbosity (i.e. -vv) up to 3 times (e.g. -Ivvv). For more information, see pip install –help First, I see two … Read more
Try random.randrange: from random import randrange print(randrange(10))
This is my personal recommendation for beginners: start by learning virtualenv and pip, tools which work with both Python 2 and 3 and in a variety of situations, and pick up other tools once you start needing them. Now on to the answer to the question: what is the difference between these simalarly named things: … Read more
Are you talking about multi-line strings? Easy, use triple quotes to start and end them. s = “”” this is a very long string if I had the energy to type more and more …””” You can use single quotes too (3 of them of course at start and end) and treat the resulting string … Read more
Though classmethod and staticmethod are quite similar, there’s a slight difference in usage for both entities: classmethod must have a reference to a class object as the first parameter, whereas staticmethod can have no parameters at all. Example class Date(object): def __init__(self, day=0, month=0, year=0): self.day = day self.month = month self.year = year @classmethod … Read more
Have you tried the __name__ attribute of the class? ie type(x).__name__ will give you the name of the class, which I think is what you want. >>> import itertools >>> x = itertools.count(0) >>> type(x).__name__ ‘count’ If you’re still using Python 2, note that the above method works with new-style classes only (in Python 3+ … Read more
Use time.time() to measure the elapsed wall-clock time between two points: import time start = time.time() print(“hello”) end = time.time() print(end – start) This gives the execution time in seconds. Another option since Python 3.3 might be to use perf_counter or process_time, depending on your requirements. Before 3.3 it was recommended to use time.clock (thanks … Read more