file write in python code example

Example 1: python file open modes

r for reading
r+ opens for reading and writing (cannot truncate a file)
w for writing
w+ for writing and reading (can truncate a file)
rb for reading a binary file. The file pointer is placed at the beginning of the file.
rb+ reading or writing a binary file
wb+ writing a binary file
a+ opens for appending
ab+ Opens a file for both appending and reading in binary. The file pointer is at the end of the file if the file exists. The file opens in the append mode.
x open for exclusive creation, failing if the file already exists (Python 3)

Example 2: python write to file

file = open(“testfile.txt”,”w”) 
 
file.write(“Hello World”) 
file.write(“This is our new text file”) 
file.write(“and this is another line.”) 
file.write(“Why? Because we can.”) 
 
file.close()

Example 3: python write file

with open("file.txt", "w") as file:
  for line in ["hello", "world"]:
    file.write(line)

Example 4: python write to file

with open(filename,"w") as f:
  f.write('Hello World')

Example 5: python write to file

# using 'with' block

with open("xyz.txt", "w") as file: # xyz.txt is filename, w means write format
  file.write("xyz") # write text xyz in the file
  
# maunal opening and closing

f= open("xyz.txt", "w")
f.write("hello")
f.close()

# Hope you had a nice little IO lesson

Example 6: how write to file in python

f = open("demofile2.txt", "a")
f.write("Now the file has more content!")
f.close()

#open and read the file after the appending:
f = open("demofile2.txt", "r")
print(f.read())