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
For non-negative (unsigned) integers only, use isdigit(): >>> a = “03523” >>> a.isdigit() True >>> b = “963spam” >>> b.isdigit() False Documentation for isdigit(): Python2, Python3 For Python 2 Unicode strings: isnumeric().
Yep, using the staticmethod decorator: class MyClass(object): @staticmethod def the_static_method(x): print(x) MyClass.the_static_method(2) # outputs 2 Note that some code might use the old method of defining a static method, using staticmethod as a function rather than a decorator. This should only be used if you have to support ancient versions of Python (2.2 and 2.3): … Read more
To pad strings: >>> n = ‘4’ >>> print(n.zfill(3)) 004 To pad numbers: >>> n = 4 >>> print(f'{n:03}’) # Preferred method, python >= 3.6 004 >>> print(‘%03d’ % n) 004 >>> print(format(n, ’03’)) # python >= 2.6 004 >>> print(‘{0:03d}’.format(n)) # python >= 2.6 + python 3 004 >>> print(‘{foo:03d}’.format(foo=n)) # python >= 2.6 … Read more
Set the mode in open() to “a” (append) instead of “w” (write): with open(“test.txt”, “a”) as myfile: myfile.write(“appended text”) The documentation lists all the available modes.
Empty strings are “falsy” (python 2 or python 3 reference), which means they are considered false in a Boolean context, so you can just do this: if not myString: This is the preferred way if you know that your variable is a string. If your variable could also be some other type then you should … Read more
Try the method rstrip() (see doc Python 2 and Python 3) >>> ‘test string\n’.rstrip() ‘test string’ Python’s rstrip() method strips all kinds of trailing whitespace by default, not just one newline as Perl does with chomp. >>> ‘test string \n \r\n\n\r \n\n’.rstrip() ‘test string’ To strip only newlines: >>> ‘test string \n \r\n\n\r \n\n’.rstrip(‘\n’) ‘test … Read more