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Python Regex instantly replace groups
...re.sub:
result = re.sub(r"(\d.*?)\s(\d.*?)", r"\1 \2", string1)
This is Python's regex substitution (replace) function. The replacement string can be filled with so-called backreferences (backslash, group number) which are replaced with what was matched by the groups. Groups are counted the same ...
Splitting on last delimiter in Python string?
What's the recommended Python idiom for splitting a string on the last occurrence of the delimiter in the string? example:
...
What's the best way of scraping data from a website? [closed]
...ited for this task and the library/framework support is poor in this area. Python (Scrapy is a great starting point) and Clojure/Clojurescript (incredibly powerful and productive but a big learning curve) are great languages for this problem. Since you would rather not learn a new language and you a...
How can I extract the folder path from file path in Python?
...hould consider using pathlib for new development. It is in the stdlib for Python3.4, but available on PyPI for earlier versions. This library provides a more object-orented method to manipulate paths <opinion> and is much easier read and program with </opinion>.
>>> import pa...
Ubuntu running `pip install` gives error 'The following required packages can not be built: * freety
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Why not directly use sudo apt-get install python-matplotlib as recommended here: matplotlib.org/users/installing.html
– Timo
Nov 8 '14 at 21:16
2
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Using a dictionary to count the items in a list [duplicate]
I'm new to Python and I have a simple question, say I have a list of items:
8 Answers
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How do you create nested dict in Python?
...y create a new key entry in the dict and cause a lot of havoc.
Here is a Python3 example with nested_dict module:
import nested_dict as nd
nest = nd.nested_dict()
nest['outer1']['inner1'] = 'v11'
nest['outer1']['inner2'] = 'v12'
print('original nested dict: \n', nest)
try:
nest['outer1']['wro...
How to save all the variables in the current python session?
I want to save all the variables in my current python environment. It seems one option is to use the 'pickle' module. However, I don't want to do this for 2 reasons:
...
How to achieve code folding effects in Emacs?
...
I use the outline minor mode to fold my python code. Instead of needing to place {{{ and }}} as in folding mode, it uses where the block is defined.
http://www.gnu.org/software/emacs/manual/html_node/emacs/Outline-Mode.html
http://www.emacswiki.org/emacs/OutlineMi...
How to remove all characters after a specific character in python?
...l contain all of the original string.
The partition function was added in Python 2.5.
partition(...)
S.partition(sep) -> (head, sep, tail)
Searches for the separator sep in S, and returns the part before it,
the separator itself, and the part after it. If the separator is not
found, ...