Writing Text Files

• Getting a File object
• Write Mothod
• Write Mothod Example
• Writelines Method
• Writelines Example

Getting a File object

• Get a file object with:
  • a filename of filepath
  • write mode (‘w’)

with open(filename, 'w') as f:

Write Method

Syntax

f.write(s)

• passing/write a string s to f

Write Mothod Example

with open('out.txt', 'w') as f: 
    f.write("Hello, world!")
    f.write("Good morning!\n")
    f.write("Good night!\n")

Writelines Method

Syntax

f.writelines(sequence)

• is the counterpart to readlines.
• write each item in a sequence as a string to f
• it accepts a sequence and write each item as a string to a file object

Writelines Example

• we want to wrote 5 lines to a file called out.txt

with open('out.txt', 'w') as f: 
    lines = [f'line{n}' for n in range(1,6)]
    # list comprehension to generate a list with string items: each item will be the string line 1 to line 5
    f.writelines(lines)
    # there is no new line character, therefore all in one line

with open('out.txt', 'w') as f: 
    lines = [f'line{n}\n' for n in range(1,6)]
    f.writelines(lines)

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