open python code example
Example 1: python read file line by line
with open("file.txt") as file_in:
lines = []
for line in file_in:
lines.append(line)
Example 2: open file python
with open('filename', 'a') as f:
f.write(var1)
f.write('data')
f.close()
with open('filename', 'r') as f:
with open('filename', 'x') as f:
with open('filename', 't') as f:
with open('filename', 'b') as f:
with open('filename', 'w') as f:
with open('filename', '+') as f:
Example 3: python with file.open
file = open("welcome.txt", "r")
data = file.read()
file.close()
with open("welcome.txt") as infile:
data = file.read()
Example 4: with open python types
'r' Open a file for reading. (default)
'w' Open a file for writing. Creates a new file if it does not exist or truncates the file if it exists.
'x' Open a file for exclusive creation. If the file already exists, the operation fails.
'a' Open for appending at the end of the file without truncating it. Creates a new file if it does not exist.
't' Open in text mode. (default)
'b' Open in binary mode.
'+' Open a file for updating (reading and writing)
Example 5: how to open a file in python
f = open("demofile.txt")
Example 6: *open(0) in python
stdout = open(1, "w")
stdout.write("Hello World")
stdout.close()