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what is the difference between 'transform' and 'fit_transform' in sklearn
...ea2aff> in <module>()
----> 1 pc2.transform(X)
/usr/local/lib/python3.4/dist-packages/sklearn/decomposition/pca.py in transform(self, X, y)
714 # XXX remove scipy.sparse support here in 0.16
715 X = atleast2d_or_csr(X)
--> 716 if self.mean_ is not None...
UnicodeEncodeError: 'charmap' codec can't encode - character maps to , print function [du
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@MartijnPieters if you click the link then you see Python3.6 recommendation.
– jfs
Jan 13 '17 at 17:52
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Why doesn't requests.get() return? What is the default timeout that requests.get() uses?
... '<your url>' command. For python, strace -ff -e network -s 10000 -- python3 <your python script> command can be used.
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Render HTML to PDF in Django site
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In python3, except the conversion cStringIO.StringIO to io.StringIO, we must define result as result = io.BytesIO() instead of result = StringIO.
– Sebastien
May 9 '16 at 20:42
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Parsing JSON with Unix tools
...as well:
Python 3:
curl -s 'https://api.github.com/users/lambda' | \
python3 -c "import sys, json; print(json.load(sys.stdin)['name'])"
Python 2:
export PYTHONIOENCODING=utf8
curl -s 'https://api.github.com/users/lambda' | \
python2 -c "import sys, json; print json.load(sys.stdin)['name...
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...
What does -> mean in Python function definitions?
...cause most python libraries still aim to be compatible with python2.x. As python3.x begins to become more standard, we might see more of these things popping up here and there...
– mgilson
Jan 17 '13 at 14:15
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Linux C/C++程序常用的调试手段及异常排查总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
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性能如何
是否有一些执行耗时的操作，I/O，网络文件下载，文件解析等，是否可以进行优化？是否会影响到功能体验？使用异步线程执行会更好吗？
多线程相关
是否涉及到多线程，临界区访问是否正常？会引入多线程...
Install specific git commit with pip
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For me (pip 9.0.1 in python3.5 virtualenv ) it didn't work : pip install -r requirements.txt raised 'Could not detect requirement name, please specify one with #egg='. But it worked with the format '-e git+github.com/owner/repository.git#egg=bran...
Python TypeError: not enough arguments for format string
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For python3 this "solution" is wrong -> Invalid syntax
– JonyD
Jun 17 '19 at 16:44
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