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Python File read operations Class & global var File write op's Glob module Conditional stms String 2 hex UNIX in Python Diamond Pattern TypeError - arg TyprError - str TypeError - strconv AttributeError Function call Read bin files

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We can also use 

Readlines - as list of strings

Readline - reads only a single line

Read file from command line

Command line arguments lists as string with sys.argv’

import sys

import os

import string


def file_read(file):

      rfile = file.read()

      print rfile


if len(sys.argv) == 1:



   file_read(open(sys.argv[1], 'r'))



import sys

import os

import string


def file_read(file):

      rfile = file.read()

      print rfile


file = file_read(open('readme.txt', 'r'))



Python File Read operations

Open and read file from within the Python program as a single string using 'read'

Following list of programs are discussed in this sec

Open and read file from within the python program as a single string. Command line arguments lists as string with ‘sys.argv’.

Use of  glob module in Python code . Read file using classes, global variables and functions. Program to open and write file.

Specify files to be written from the command

line. File writes using classes and global variables

Steps for conditional statements, converting

string to hexadecimal value, strip of white space

at end ,converting 12 bit hexadecimal values to

12 bit signed values.

Advanced program to read file, filter text, conversion to HEX, conversion from Hexadecimal to Signed Magnitude

Advanced python code to cover UNIX shell commands, read lines from a text file, ‘sysargv’ command line operations, use of class and multiple functions. 

Write a program to generate diamond pattern.

Python error’s with complete code examples:-

TypeError: __init__() takes exactly 2 arguments (1 given),

TypeError: 'str' object is not callable, TypeError: not all arguments converted during string formatting,

AttributeError:  ** instance has no attribute **

Implement Python function calls to different classes.

Python read binary files, use of struct.unpack.