File handling in python - code anatomy
File handling in Python is the process of reading, writing, and manipulating files. Python provides a built-in module called io that provides a number of functions for working with files.
The open() function is used to open a file. The open() function takes two arguments: the name of the file and the mode. The mode specifies how the file will be opened. The following are the most common modes:
r - Read mode. This mode is used to open a file for reading.
w - Write mode. This mode is used to open a file for writing.
a - Append mode. This mode is used to open a file for appending.
Once a file is opened, you can use the read() function to read the contents of the file. The read() function takes an argument that specifies the number of bytes to read. If the argument is not specified, the entire file will be read.
You can also use the write() function to write to a file. The write() function takes a string as an argument and writes the string to the file.
When you are finished with a file, you should close it using the close() function. The close() function ensures that the file is properly closed and that any changes to the file are saved.
def read_file(filename):
with open(filename, "r") as f:
data = f.read()
return data
def write_file(filename, data):
with open(filename, "w") as f:
f.write(data)
if _name_ == "__main__":
data = read_file("myfile.txt")
print(data)
write_file("myfile.txt", "This is new data")
This code will read the contents of the file myfile.txt and print the contents to the console. The code will then write the string "This is new data" to the file myfile.txt.
File handling in Python is a powerful tool that can be used to read, write, and manipulate files. The io module provides a number of functions that make it easy to work with files.
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