Python

in Python, the OS module and Shutil module used frequently in the file and directory operation are often use. 1. Get the current working folder, that is, the folder path of the current Python script work: OS.GETCWD ()2. Returns all file and folder

Yeild: Returns a Generator object;Adorner: itself is a function that functions to decorate other functions (calling other functions)Function: Enhance the function of the decorated functionAdorners generally accept a function object as a parameter,

Environment: Windows8.1, Python3.6 pycharm Community 2017There is a configuration file under the C drive: Setup1 with open ('c:\\setup','r') as F:2 F.read ()Hint always weird: filenotfounderror: [Errno 2] No such file or directory: '

Import OSImport Sys# Print (OS.GETCWD ()) #取当前工作目录# Os.chmod ("/usr/local", 7) #给文件/directory plus permissions# Print (Os.chdir (r "E:\byz_code\day2")) #更改当前目录# print (Os.curdir) #当前目录# print (Os.pardir) #父目录# Print (Os.mkdir (r "test1)) #创建文件夹#

The essence of the import module is to import the code inside the module, from top to bottom to execute it againThe order of the modules to find, first from the current directory to find, can not find, then the environment variable inside to

If a folder has __init__.py this file, then this folder can be called a package.So what is a bag? (consisting of multiple modules, i.e.. py files)But for the difference between Python2 and Python3,When importing a module, it can be written from.

Regular expressionsFirst, query functionImportRes='Besttest is good are'Print(Re.match (R' be', s). Group ())#string pre-plus R for the original string#The match method receives 3 parameters, the first one is the regular expression, the second is

['__class__','__contains__','__delattr__','__delitem__','__dir__','__doc__','__eq__','__format__','__ge__','__getattribute__','__getitem__','__gt__','__hash__','__init__','__iter__','__le__','__len__','__lt__','__ne__',

Example Def foo (*args, **kwargs): print ' args = ', args print ' Kwargs = ', Kwargs print '---------------------------- -----------' If __name__ = = ' __main__ ': foo (1,2,3,4) Foo (a=1,b=2,c=3) Foo (1,2,3,4, a=1,b=2,c=3) Foo (' A ', 1,

The final review compared busy time to write Scrapy framework use, today describes how to use Python to generate word cloud, although there are many word cloud generation tools on the Web, but their own python to write is not a more fulfilling sense.

1. String length #strlen (str) # string length function nameStr= ' Apples ' # assigns the string "apples" to the variable strPrint (len (str)) # Prints the length of the string 2. Find characters #strchr (STR1,STR2) # Find character function

One, top 3,000 people list page 2) Analysis page structure: Each TD is, a person. First small to rank The second a tag is the nickname and Username, and the home page's blog address. User name interception by address acquisition The fourth small

Job One: Write the login interface 1. Enter your user name and password 2. Display welcome message after successful authentication 3. Three times after the wrong lock The above work, with a number of ideas to solve the problem, but essentially

Expression Expand Word Break II Partition Equal subset Sum Expression Expand String expansion problem, according to the number of [] before the expansion of the string, mainly to maintain two stacks, one is the expansion of the stack is the

Python and Python3 are exactly two languages. 0x00 Import Caffe FAILED　　Environment for Ubuntu Cuda 8.0 NVIDIA 361.77 Anaconda2. Yesterday inexplicably Caffe can not be used: >>> Import Caffetraceback (most recent): file "", line 1, in File "

HTTP protocol: HTTP (Hypertext Transfer Protocol): The Hypertext Transfer Protocol. URLs are Internet paths that access resources through the HTTP protocol, and a URL corresponds to a data resource. The HTTP protocol operates on resources: The

The product environment model deploys, creates the simple Web APP, the user uploads the image, runs the inception model, realizes the image automatic classification. Build TensorFlow service development environment. Install Docker,. Create a Docker

Use of 1.==,is Summarize is is to compare whether two references point to the same object (reference comparison). == is a comparison of two objects for equality. 2. Deep copy, Shallow copy 1. Shallow copy A shallow copy is a top-level copy of

Job: Shopping mall Product Display, Price Buy, add to Cart Payment, not enough money Specifically, the following functions are implemented:1, can purchase the product information display2. Display the product information, quantity, total amount in

From time import *from XLWT. Workbook Import *from XLWT. Style Import *style = Xfstyle () WB = Workbook () Ws0 = Wb.add_sheet (' 0 ') ColCount = + 1rowcount = 6000 + 1t0 = time () print ("\nstart:%s"% CTime (t0)) print ("Filling ...") for Col in