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App Inventor 2 FTP 上传下载全方案总结 · App Inventor 2 中文网
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App Inventor 2 FTP 上传下载全方案总结
KIO FTPCliente
TaifunFTP （收费的:$12，请自行研究）
FTPClient （收费的:$5，请自行研究）
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目前只能使用拓展...
How to run multiple Python versions on Windows
...
install python
C:\Python27
C:\Python36
environment variable
PYTHON2_HOME: C:\Python27
PYTHON3_HOME: C:\Python36
Path: %PYTHON2_HOME%;%PYTHON2_HOME%\Scripts;%PYTHON3_HOME%;%PYTHON3_HOME%\Scripts;
file rename
C:\Python27\python.exe → C:\Python27\pyt...
List comprehension vs map
...CAN BE LAZY, and in fact is lazy in python. That means you can do this (in python3) and your computer will not run out of memory and lose all your unsaved data:
>>> map(str, range(10**100))
<map object at 0x2201d50>
Try doing that with a list comprehension:
>>> [str(n) fo...
How to import a Python class that is in a directory above?
...ot covered here.
some_directory/
foo.py
setup.py
.
#!/usr/bin/env python3
# setup.py
import setuptools
setuptools.setup(
name="foo",
...
py_modules=['foo'],
)
.
python3 -m pip install --editable ./ # or path/to/some_directory/
"editable" aka -e will yet-again redirect the i...
Why is there no tuple comprehension in Python?
... is tuple([generator]).
Performance Comparison
List comprehension:
$ python3 -m timeit "a = [i for i in range(1000)]"
10000 loops, best of 3: 27.4 usec per loop
Tuple from list comprehension:
$ python3 -m timeit "a = tuple([i for i in range(1000)])"
10000 loops, best of 3: 30.2 usec per loop...
What are good uses for Python3's “Function Annotations”
Function Annotations: PEP-3107
12 Answers
12
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App Inventor 2 接入百度网盘API · App Inventor 2 中文网
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App Inventor 2 接入百度网盘API：文件下载
1、申请应用
2、用户登录认证，拿到access_token，后续请求必备参数 【使用Web浏览框】
3、获取文件列表，返回JSON，拿出想要的文件的fsid 【使用Web客...
How can I connect to MySQL in Python 3 on Windows?
...as it is a fork
Debian and Ubuntu use it to provide both python-mysqldb andpython3-mysqldb packages.
benchmarks here: https://github.com/methane/mysql-driver-benchmarks
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improve this answer...
How do I parse an ISO 8601-formatted date?
...Traceback (most recent call last):
File "", line 1, in
File "/usr/lib/python3.4/_strptime.py", line 500, in _strptime_datetime
tt, fraction = _strptime(data_string, format)
File "/usr/lib/python3.4/_strptime.py", line 337, in _strptime
(data_string, format))
ValueError: time data '200...
Print a string as hex bytes?
...
Note that in python3, the concept of printing a str as hex doesn't really make sense; you'll want to print bytes object as hex (convert str to bytes by calling .encode()).
– mic_e
May 8 '15 at 12:53
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