The implementation of Python for reading files by line [small file and large file reading]

This article illustrates the implementation of Python for reading files by line. I will share it with you for your reference as follows:

Small files:

#coding=utf-8
#author: walker
#date: 2013-12-30
#function:  Read small files by line 
all_lines = []
try:
  file = open('txt.txt', 'r')
  all_lines = file.readlines()
except IOError as err:
  print('File error: ' + str(err))
finally:
  if 'file' in locals():
    file.close()
for line in all_lines:
  print(line)

Large files:

#coding=utf-8
#author: walker
#date: 2013-12-30
#function:  Read large files by line 
try:
  file = open('txt.txt', 'r')
  for line in file:
    print(line)
except IOError as err:
  print('File error: ' + str(err))
finally:
  if 'file' in locals():
    file.close()

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I hope this article is helpful to you Python programming.