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Catch multiple exceptions in one line (except block)
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From Python Documentation:
An except clause may name multiple exceptions as a parenthesized tuple, for example
except (IDontLikeYouException, YouAreBeingMeanException) as e:
pass
Or, for Python 2 only:
except (IDontLi...
proper name for python * operator?
... those communities will figure out what you mean if you call it that.
The Python tutorial uses the phrase "unpacking argument lists", which is long and descriptive. I haven't heard any other particular name for it in Python.
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Checking a Python module version at runtime
Many third-party Python modules have an attribute which holds the version information for the module (usually something like module.VERSION or module.__version__ ), however some do not.
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Alphabet range in Python
...']
Other helpful string module features:
>>> help(string) # on Python 3
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DATA
ascii_letters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
ascii_lowercase = 'abcdefghijklmnopqrstuvwxyz'
ascii_uppercase = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
digits = '0123456789'
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Print in one line dynamically
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Change print item to:
print item, in Python 2.7
print(item, end=" ") in Python 3
If you want to print the data dynamically use following syntax:
print(item, sep=' ', end='', flush=True) in Python 3
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How can I multiply all items in a list together with Python?
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Python 3: use functools.reduce:
>>> from functools import reduce
>>> reduce(lambda x, y: x*y, [1,2,3,4,5,6])
720
Python 2: use reduce:
>>> reduce(lambda x, y: x*y, [1,2,3,4,5,6])
720
For compa...
How do I change the working directory in Python?
... the current working directory in the parent process. This is true of the Python interpreter as well. You cannot use os.chdir() to change the CWD of the calling process.
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Windows path in Python
...the correct configuration for your OS:
os.path.join(mydir, myfile)
From python 3.4 you can also use the pathlib module. This is equivelent to the above:
pathlib.Path(mydir, myfile)
or
pathlib.Path(mydir) / myfile
sha...
How to read a (static) file from inside a Python package?
Could you tell me how can I read a file that is inside my Python package?
8 Answers
8
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What is the correct syntax for 'else if'?
I'm a new Python programmer who is making the leap from 2.6.4 to 3.1.1. Everything has gone fine until I tried to use the 'else if' statement. The interpreter gives me a syntax error after the 'if' in 'else if' for a reason I can't seem to figure out.
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