How to get rid of global variables gl_args and gl_hashType, while preserving all the functionality of the program. Hint: Use python to add arguments and return values to functions to pass the necessary variables in and out. def ParseCommandLine():parser = argparse. ArgumentParser('Python file system hashing p-fish')parser.add_argument ('-v', "--verbose", help="allows progress messages to be displayed", action='store_true')# setup a group where the selection is mutually exclusive and required.group = parser.add_mutually_exclusive_group (required=True)group.add_argument('--md5'help = 'specifies MD5 algorithm',group.add_argument('--sha256' help = 'specifies SHA256 algorithm',group.add_argument('--sha512',action='store_true')action='store_true')action='store_true')group.add_argument ('--sha224'help = 'specifies SHA512 algorithm',help = 'specifies SHA224 algorithm'action='store_true')group.add_argument ('--sha384', help = 'specifies SHA384 algorithm', action='store_true')parser.add_argument ('-d', '--rootPath', type= ValidateDirectory, required=True, help="specify the root path for hashing")parser.add_argument ('-r', '--reportPath', type= ValidateDirectorywritable, required=True, help="specify the path for reports and logs will be written")global gl_argsglobal gl_hashTypegl_args = parser.parse_args()if gl_args.md5:gl_hashType = 'MD5'elif gl_args.sha256:gl_hashType = 'SHA256'elif gl_args.sha512:gl_hashType = 'SHA512'elif gl_args.sha224:gl_hashType = 'SHA224'elif gl_args.sha384:gl_hashType = 'SHA384'"# create a global object to hold the validated arguments, these will be available then# to all the Functions within the _pfish.py moduleelse:"returngl_hashType = "Unknown"logging.error('Unknown Hash Type Specified')DisplayMessage("Command line processed: Successfully") def DisplayMessage (msg):if gl_args. verbose:print (msg)return

Answered: How to get rid of global variables…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

How to get rid of global variables gl_args and gl_hashType, while preserving all the functionality of the program.
Hint: Use python to add arguments and return values to functions to pass the necessary variables in and out.

def ParseCommandLine():
parser = argparse. ArgumentParser('Python file system hashing p-fish')
parser.add_argument ('-v', "--verbose", help="allows progress messages to be displayed", action='store_true')
# setup a group where the selection is mutually exclusive and required.
group = parser.add_mutually_exclusive_group (required=True)
group.add_argument('--md5'
help = 'specifies MD5 algorithm',
group.add_argument('--sha256' help = 'specifies SHA256 algorithm',
group.add_argument('--sha512',
action='store_true')
action='store_true')
action='store_true')
group.add_argument ('--sha224'
help = 'specifies SHA512 algorithm',
help = 'specifies SHA224 algorithm'
action='store_true')
group.add_argument ('--sha384', help = 'specifies SHA384 algorithm', action='store_true')
parser.add_argument ('-d', '--rootPath', type= ValidateDirectory, required=True, help="specify the root path for hashing")
parser.add_argument ('-r', '--reportPath', type= ValidateDirectorywritable, required=True, help="specify the path for reports and logs will be written")
global gl_args
global gl_hashType
gl_args = parser.parse_args()
if gl_args.md5:
gl_hashType = 'MD5'
elif gl_args.sha256:
gl_hashType = 'SHA256'
elif gl_args.sha512:
gl_hashType = 'SHA512'
elif gl_args.sha224:
gl_hashType = 'SHA224'
elif gl_args.sha384:
gl_hashType = 'SHA384'
"
# create a global object to hold the validated arguments, these will be available then
# to all the Functions within the _pfish.py module
else:
"
return
gl_hashType = "Unknown"
logging.error('Unknown Hash Type Specified')
DisplayMessage("Command line processed: Successfully")

def DisplayMessage (msg):
if gl_args. verbose:
print (msg)
return

Expert Solution

Step 1 Introduction

Python which refers to the high-level, general purpose programming language. Its design which emphasizes code that the readability with the use of significant indentation. Python is dynamically typed and it is garbage collected. It supports multiple programming paradigms, including structured, object-oriented and functional programming.

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