open and read a file in python code example

Example 1: python read file

with open("file.txt", "r") as txt_file:
  return txt_file.readlines()

Example 2: read file python

document = 'document.txt'
file = open(document, 'r')
# 'r' can be replaced with:
# 'w' to write
# 'a' to append (add to the end)
# 'w+' makes a new file if one does not already exist of that name
# 'a+' is the same as 'w+' but it appends if the file does exist

##go to beginning of document
file.seek(0)

##print all lines in document, except empty lines:
for i in file:
    k = i.strip() 
    print k

##close the file after you are done
file.close()


##this can temporarily open a file:
with open(document) as ur:
    for i in ur:
        k = i.strip() 
        print k

Example 3: python open and read file with

with open('pagehead.section.htm','r') as f:
    output = f.read()

Example 4: read and write to file python

file = open(“testfile.txt”, “r+”)