大约有 5,685 项符合查询结果（耗时：0.0359秒） [XML]
In Python script, how do I set PYTHONPATH?
...
You don't set PYTHONPATH, you add entries to sys.path. It's a list of directories that should be searched for Python packages, so you can just append your directories to that list.
sys.path.append('/path/to/whatever')
In fact, sys.path ...
Mapping over values in a python dictionary
...hension:
my_dictionary = {k: f(v) for k, v in my_dictionary.items()}
In python 2.7, use the .iteritems() method instead of .items() to save memory. The dict comprehension syntax wasn't introduced until python 2.7.
Note that there is no such method on lists either; you'd have to use a list compre...
When to use Tornado, when to use Twisted / Cyclone / GEvent / other [closed]
...
"Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design". If you are building something that is similar to a e-commerce site, then you should probably go with Django. It will get your work done quic...
Printing Lists as Tabular Data
I am quite new to Python and I am now struggling with formatting my data nicely for printed output.
13 Answers
...
In Python, how do I use urllib to see if a website is 404 or 200?
...
The getcode() method (Added in python2.6) returns the HTTP status code that was sent with the response, or None if the URL is no HTTP URL.
>>> a=urllib.urlopen('http://www.google.com/asdfsf')
>>> a.getcode()
404
>>> a=urllib.url...
How to convert string representation of list to a list?
..._eval, you can safely evaluate an expression node or a string containing a Python expression. The string or node provided may only consist of the following Python literal structures: strings, numbers, tuples, lists, dicts, booleans, and None.
...
How do I abort the execution of a Python script? [duplicate]
I have a simple Python script that I want to stop executing if a condition is met.
8 Answers
...
Assignment inside lambda expression in Python
...
The assignment expression operator := added in Python 3.8 supports assignment inside of lambda expressions. This operator can only appear within a parenthesized (...), bracketed [...], or braced {...} expression for syntactic reasons. For example, we will be able to write...
Python datetime to string without microsecond component
...at avoids problems if standard datetime-str conversion changes in a future Python version
– Alan Evangelista
Nov 11 '14 at 15:04
2
...
How do I calculate the date six months from the current date using the datetime Python module?
I am using the datetime Python module. I am looking to calculate the date 6 months from the current date. Could someone give me a little help doing this?
...