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Can I force pip to reinstall the current version?
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If you want to reinstall packages specified in a requirements.txt file, without upgrading, so just reinstall the specific versions specified in the requirements.txt file:
pip install -r requirements.txt --ignore-installed
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read complete file without using loop in java
... file is small, you can read the whole data once:
File file = new File("a.txt");
FileInputStream fis = new FileInputStream(file);
byte[] data = new byte[(int) file.length()];
fis.read(data);
fis.close();
String str = new String(data, "UTF-8");
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由12306.cn谈谈网站性能技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...机端浏览也是这个情形）。我查看了一下12306首页的需要下载的总文件大小大约在900KB左右，如果你访问过了，浏览器会帮你缓存很多，只需下载10K左右的文件。但是我们可以想像一个极端一点的案例，1百万用户同时访问，且都...
Download File Using jQuery
...f you don't want search engines to index certain files, you can use robots.txt to tell web spiders not to access certain parts of your website.
If you rely only on javascript, then some users who browse without it won't be able to click your links.
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In C, how should I read a text file and print all strings
I have a text file named test.txt
7 Answers
7
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What is setup.py?
....py
│ └── internals.py
├── README
├── requirements.txt
└── setup.py
Then, you do the following in your setup.py script so that it can be installed on some machine:
from setuptools import setup
setup(
name='foo',
version='1.0',
description='A useful module...
Get last n lines of a file, similar to tail
...the very file end with seek(0, 2)).:
eg: f = open('C:/.../../apache_logs.txt', 'rb')
def tail(f, lines=20):
total_lines_wanted = lines
BLOCK_SIZE = 1024
f.seek(0, 2)
block_end_byte = f.tell()
lines_to_go = total_lines_wanted
block_number = -1
blocks = []
while li...
Writing string to a file on a new line every time
... an additional function wl that does what you want:
fid = cfile('filename.txt', 'w')
fid.wl('appends newline charachter')
fid.wl('is written on a new line')
fid.close()
Maybe I am missing something like different newline characters (\n, \r, ...) or that the last line is also terminated with a new...
Linux how to copy but not overwrite? [closed]
...existing file (overrides a previous -i option)
Example:
cp -n myoldfile.txt mycopiedfile.txt
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Copy folder structure (without files) from one location to another
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You could do something like:
find . -type d > dirs.txt
to create the list of directories, then
xargs mkdir -p < dirs.txt
to create the directories on the destination.
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