python-files and built-in functions open (), file ()

Ternary Operations

Ternary operations, also known as trinocular operations, are shorthand for simple conditional statements:

Simple Conditional statement:

if condition established:    val=1else:    val=2

Change to ternary operation;

file ProcessingNow there is a file ' part-time student contacts ', how to view content?

1. Installing the Text editor software

2. Select the right button. Open with a text editor

3. View or Write

4. Save, close

File operations are divided into read, write, modify

First step, read. How to open a file

R Open as read (the file does not exist, the error is not provided access_mode default value)

W is opened in write mode (the file exists is emptied and does not exist)

A opens in Append mode (creates a new file if necessary) r+ open in read-write mode (see R) w+ open in read-write mode (see W) A + opens in read-write mode (see a)

F=open (file='d:/work daily/part-time student contact us. txt', mode='r', encoding= ' Utf-8 ' #以读的方式打开文件data=f.read () #接着上一步, to continue to manipulate the file, you will assign a value, open the file, save a variable, and then. Read f.close# Close the folder

Absolute path: d:/work daily/part-time student Contact Us

Relative path: The current file can be found

Chardet: Judging the possible encoding

Decode and check.

Write mode operation file

Step Two, write the file

python-files and built-in functions open (), file ()