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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...
Python Nose Import Error
...ase, nosetests was the one in /usr/bin/nosetests, which was using /usr/bin/python. The packages in the virtualenv definitely won't be in the system path. The following fixed this:
source myvirtualenv/activate
pip install nose
which nosetests
/home/me/myvirtualenv/bin/nosetests
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How do you check whether a number is divisible by another number (Python)?
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E.g. try x=10000000000000000; b = str(x/(x-1)); b in the python interpreter.
– NickD
Oct 18 '19 at 15:08
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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...
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:
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Different ways of clearing lists
...e complicated than one of these two lines when you want to clear a list in Python?
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 sort a list/tuple of lists/tuples by the element at a given index?
... @Cemre as for the second example, sort here is a method of List object of Python, which receives a lambda function as its key parameter. You may name it as tup, or t, or whatever you like and it'll still work. tup here specifies index of the list's tuple, so 1 means that sorting will be performed b...
How can I make setuptools install a package that's not on PyPI?
...ted working with setuptools and virtualenv. My package requires the latest python-gearman that is only available from GitHub. The python-gearman version that's on PyPI is an old one. The Github source is setuptools-compatible, i.e. has setup.py, etc. Is there a way to make setuptools download and in...