The default terminal launcher Python in Python is in the/usr/bin/directory.
The default system library path in Python is in the/usr/lib/pythonx.x/directory.
The default Third-party library p
valid directory to the module search path, that is, a text file with the suffix. PTH that lists the directories in a row, you can place a. path file on the top level of the Python installation directory (for example, C:\Python27) to expand the module search path. At this time can play the role of Pythonpath,
othe
table to return. Therefore, glob. glob () is a good way to query files in a directory.
The syntax of this file name expression is different from the regular expression of Python itself (you can check the fnmatch package at the same time. Its function is to check whether a file name conforms to the Linux File Name format expression ). As follows:
Filename pattern expression Python Regular Expression
*.*
? .
First, remove the current path:
Base_dir1 = Os.path.dirname (Os.path.dirname (__file__))
Base_dir2 = Os.path.dirname (Os.path.abspath (__file__))
# __file__: Refers to the directory address where this file resides (including the file name) but is related to the directory where the Python command is executed (relative address).
# dirname (__file__): The top level of the file.
# Abspath (__file__): The abs
Python standard library OS. path package, glob package use instance, OS. pathglob
OS. path package
The OS. path package is mainly used to process string paths, such as '/home/zikong/doc/file.doc' to extract useful information.
Copy codeThe Code is as follows:Import OS. pathP
This article mainly introduces the Python standard library OS. path package and glob package usage examples. This article provides the code directly. the code contains detailed comments. For more information, see
OS. path package
The OS. path package is mainly used to proce
The import statement in Python imports a library file path that can be viewed through sys.path. Write a simple applet:1 Import SYS 2 Print Sys.pathTo run it, the results on this machine are as follows:[', '/usr/local/lib/python2.7/dist-packages/paste-1.7.5.1-py2.7.egg ', '/usr/lib/python2.7 ', '/usr/lib/python2.7/ Plat-x86_64-linux-gnu ', '/usr/lib/python2.7/lib-
package The most common method is only one, Glob.glob (). The function of this method is similar to LS in Linux.Accepts a Linux-style file name format expression (filename pattern,Lists all files that conform to the expression (similar to regular expressions) and returns all filenames in one table.So Glob.glob () is a good way to query files in a directory.The syntax of the file name expression is different from the regular expression of Python itsel
Python has been used for some time, and has written some useful libraries. To make it easier to use these libraries, you need to add their paths to the Python library path. After looking for data, summed up the following two ways:
import sys sys.path.append (R '
Create a. pth file in the \lib\site-packages fo
import the module under __init__.py, because __init__.py will run the load by default. If you use the IDE you will find that the code is no problem and can jump normally.Later found that can not be written so, must be medivac above and the folder to live, such an address can be. In Python's view, he doesn't see the root directory, and he thinks the project directory ismedivac/, not/medivac/.So if you change it, from __init__ Import Appcan run properly.But I think it's a lot of holes. A. py file
Requests is an HTTP client library for Python , similar to urllib,urllib2 , but urllib2 API is more complex, such as implementing a post or get function requires a lot of code.Let me briefly introduce this library today, and after I have read the official documentation, write a full-fledged one.#-*-Coding:utf8-*-import requestr = requests.get (' http://www.zhidao
As a salted fish University played 3 years of game just waking wake up, and now began to learn something, here to record their own learning.Urllib Library before some understanding will not write, starting from the requests library (ˉ▽ ̄~).The first thing to say is be sure to use the Official document: http://docs.python-requests.org/en/master/Let's look at a column first:Here are some basic uses of the requ
After Pycharm installs Unrar, also installs the RAR official libraryOtherwise it will throw couldn ' t find path to Unrar library error when runningWindows:Download Rarlib library file, address: Http://www.rarlab.com/rar/UnRARDLL.exeDownload the installation, the default setting is OKTo set environment variables after installation is completeIf it is a 64-bit ope
Result ":8. For Dataframe type Set_index () (Specified index)# returns a new dataframes that is indexed by the values in the specified column, and removes the column from Dataframe without deleting the film column fandango = pd.read_csv ("Fandango _score_comparison.csv") print(Type (fandango)) # Read the file and assign it to a variable, print the variable type, for dataframe type fandango_films = Fandango.set_index ("FILM" , drop = False) # use. Set_inde
, Symbian3, and Android systems. It is developed based on the python2.0 platform and is suitable for creating AVG games in the memories off style. Therefore, it is named PYMO. Hacker programming: python has an hack library with built-in functions that you are familiar with or are not familiar with, but lacks a sense of accomplishment. Use Python to write simple C
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Ways to add dynamic link library paths under LinuxJanuary 20, 2017 10:08:17Hits: 5596Linux Shared library Path configurationA typical scenario where a shared library file cannot be found under Linux is that a soft package (such as Libnet,mysql) has been installed, and the compile connection works, but appears at run ti
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