I. ModuleUsually the module is a file, the import directly using imports just fine. The file types that can be used as module are ". Py", ". Pyo", ". PYc", ". PYD", ". So", and ". dll".Two. PackageTypically, a package is always a directory, you can import a package using imports, or from + Import to import some of the modules in the package. A document headed by the package directory is __init__.py. Then there are some module files and subdirectories,
Use modules in Python and python
Python itself has many built-in very useful modules, which can be used immediately after installation.
The built-in sys module is used as an example to compile a hello module:
#!/usr/bin/env python
Python functionsA function can be thought of as a function in mathematics, a piece of code that accomplishes a particular function.-Absolute function abs ()-Types function type ()-Rounding function round ()There are many built-in functions in Python, that is, functions that do not require additional import.-CMP (), str (), and type () apply to all standard types. The following are numerical built-in functio
C # calls Python scripts and third party modules using Python
C Call Python script and use Python third party module to add Reference library C code embedded python load Python code fr
are in the same folder, they can be installed:chmod +x dependencies. SH chmod install. SH Install. SHThe installation process is relatively lengthy.0X03 Compiling OPENCV ProgramFor example, the file to be compiled is Pcat.cppg++-ggdb 'pkg-config –-cflags opencv ' pkg-config –-libs OpenCV ' Pcat. CPP –o pcat0x04 Windows installs NumPy, CV2 and other python2.7 modulesFor Windows, I only need to cv2 this pyt
modules in Pythonis a python file that ends with a. Py, contains Python object definitions and Python statements, and allows you to logically organize your Python code snippets. Assigning the relevant code to a module will make your code better and easier to understand.
is the best way to learn Python. To view the source code location of a module, you can:
csv.
The file to be queried is.pycThe file ending with the suffix. This is a bytecode file generated after processing by the Python interpreter..pyThe source file ending with the suffix.
4. Organization module form-Package
To further organize modules, You can group them int
Let's consider some of the following scenarios:1, write a Python program, if the program is relatively simple, you can put the code in a python file. However, if the program is more functional, multiple Python files may be needed to organize the source code. The code between these files must be associated, such as Python
solve the module dependency problem. In general, the modules installed with Setuptools will automatically be placed in a directory with a suffix of. Egg.in Windows, easy_install This command in the Python installation directory under the scripts, so you need to add scripts to the environment variable path, so it is more convenient to use, Linux does not need to
in thePythonDevelopment (http://www.maiziedu.com/course/python-px/) using the Keyword import to introduce a module, It is similar to the include header file in C + + . For example, to reference the module math, you can use import math to introduce itat the very beginning of the file . when you call a function in the math module, you must refer to this , see the code for details:>>>improt Math>>> Math . Sin (0)To import your own
Furious Python-Article 4-functions and modules, Article 4 python
PythonFunction: Actually, it is very similar to C ++, but because it is a weak language (it feels like it is ......), remove all types of declarations, and pass the value instead of reference (at least 2.7 is ), A small number of cells are defined by def (like macro definition ......), the following
Introduction
TheImportAndFrom-importStatements are a constant cause of serious confusion for newcomers to Python. Luckily, once you 've figured out what they really do, you'll never have problems with them again.
This note tries to sort out some of the more common issues relatedImportAndFrom-importAnd everything.There are always Ways to Import a Module
Python provides at least three different ways to import
Python module installationOne, single file moduleCopy the file directly to the $python _dir/libTwo, multi-file module, with setup.pyPython setup.py InstallThird, egg file1) Download ez_setup.py, run Python ez_setup2) Easy_install *.eggNote: Although Python modules can be cop
#!/usr/bin/env python# Coding=utf-8
Lang = "Python"Introducing Modules
>>> Import Sys>>> sys.path.append ("~/documents/vbs/startlearningpython/2code/pm.py")>>> Import PM>>> Pm.lang' Python 'When the Python interpreter reads. A py file, first turning it into a. pyc file tha
In-depth organization of the Windows NT/2000 Module
WebSphere (http://webcrazy.yeah.net /)
In Windows NT/2000 paging mechanism, I have described in detail the non-Paging Memory Internal Mechanism of Windows NT/2000 on the X86 platform, the address space can be divided into process space and system space. Each process has its own process space, while all processe
installation method, please refer to their official instructions (see extended reading). The simple installation command is as follows: Wget-q Ez_setup. PY (see extended reading) after installation, it is best to ensure that(method Two). Install Setuptools using the full installation packageOf course, users can also install them directly using the Setuptools release version. This is also a handy way for users who use Windows, and many of the official
Most of the system interfaces in Python are concentrated in two modules: SYS and OS. That's a little simplistic. There are also other table-to-module modules that fall into this area. They include:Glob Extensions for file namesSocket for network connection and interprocess communication (IPC)Threading,_threading,queue for running and synchronizing session concurr
for the corresponding. py file under the specified path.By default, the Python interpreter searches the current directory, all installed built-in modules, and third-party modules. The search path is stored in the PATH variable of the SYS module. Import sys>>> sys.path['c:\\windows\\system32\\python34.zip ' ' C:\\pytho
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