Reading and writing text files for advanced python tutorials

Python has basic text file reading and writing capabilities. Python's standard library provides richer read-write capabilities.

Text files are read and written primarily through the file object built by open().

Create file object

We open a file and use an object to represent the file:

f = open( File name, mode )

 
The most common patterns are:

"r"     #  read-only 

 " w "      #  write 

Such as

>>>f = open("test.txt","r")

Method of the file object

Read:

content = f.read(N)          #  read N bytes The data of 
content = f.readline()       #  Read a line 
content = f.readlines()      #  All rows are read, stored in a list, and each element is a row. 

Writing:

f.write('I like apple')      #  will 'I like apple' Written to the file 

 
Close file:

f.close()

practice

Create a record. TXT document, write as follows:

Tom, 12, 86
Lee, 15, 99
Lucy, 11, 58
Joseph, 19, 56
Then from record. TXT to read the file and print.

conclusion

f    = open(name, "r")

line = f.readline()

f.write('abc')

f.close()