word processing for mac with line numbers

Word processing for mac with line numbers windows#

The current stream position is the number of bytes from the beginning of the file in binary mode, and an opaque number in text mode.

fileObj.tell() -> int: returns the current stream position.

Sys.exit(1) # Return a non-zero value to indicate abnormal termination # Check and retrieve command-line arguments #!/usr/bin/env python3 # -*- coding: UTF-8 -*- '''įile_copy: Copy file line-by-line from source to destination The following script copies a file into another line-by-line, prepending each line with the line number. The with-statement is equivalent to the try-finally statement as follows:į.close() Example: Line-by-line File Copy Line = line.strip() # Strip the leading/trailing whitespaces and newline # Process the line # File closed automatically upon exit of with-statement With open('path/to/file.txt', 'r') as f: # Open file for read We can use a with-statement to open a file, which will be closed automatically upon exit, and a for-loop to read line-by-line as follows: > f.close() Processing Text File Line-by-Line Line = line.rstrip() # strip trailing spaces and newline # process the line print(line) line = f.readline() > f.close() # Read line-by-line using readline() in a while-loop > f.read() # Read entire file into a string > f.close() # Open the file for reading and read the entire file via read() > f.readline() # Return an empty string after EOF > f.readlines() # Read all (next) lines into a list of strings > f.readline() # Read next line into a string > f.close() # Always close the file # Check the contents of the file created # Open the file created for reading and read line(s) using readline() and readlines()

Word processing for mac with line numbers windows#

The ' ' will be translated to the platform-dependent newline ( ' ' for Windows or ' ' for Unixes/Mac OS).Įxamples # Open a file for writing and insert some records You need to explicitly terminate the str with a ' ', if needed. fileObj.write( str) -> int: Write the given string to the file and return the number of characters written.fileObj.read() -> str: Read the entire file into a string.fileObj.readlines() -> : Read all lines into a list of strings.It returns an empty string after the end-of-file (EOF). fileObj.readline() -> str: (most commonly-used) Read next line (upto and include newline) and return a string (including newline).It initially positions at the beginning of the file and advances whenever read/write operations are performed. The fileObj returned after the file is opened maintains a file pointer. fileObj.close(): Flush and close the file stream.You can optionally specify the text encoding via keyword parameter encoding, e.g., encoding='utf-8'. You can also use 'rb', 'wb', 'ab', 'rb+' for binary mode (raw-byte) operations. The available modes are: 'r' (read-only - default), 'w' (write - erase all contents for existing file), 'a' (append), 'r+' (read and write).

open( file, ) -> fileObj: Open the file and return a file object.Python provides built-in functions and modules to support these operations. Open the file for read or write or both.