Question

Create a Python script file called hw.py. Then import the module random:

from random import *

Ex. 1. Write a function called cleanLowerWord that receives a string as a paramcter and retums a new string that is a copy of the parameter where all the lowercase letters are kept as such, uppercase letters are converted to lowercase, and everything else is deleted. For example, the function call cleanLowerWord("Hello, User 15!") should return the string "hellouser". For this, you can start by copying the following functions discussed in class into your file: # Checks if ch is a lowercase letter. def isLower (ch): return 'a' <= ch and ch <= 'z' # Checks if ch is an uppercase letter. def isUpper (ch): return 'A' <= ch and ch <= 'z' Converts ch to a lowercase letter if it's an uppercase letter, # and returns it unchanged if not. def tolower(ch): if isUpper(ch): return chr(ord(ch) -ord('A')+ord('a')) else: return ch # Converst all uppercase letters in strn into lowercase and # leaves everything else unchanged. def tolowerStr(strn): lower = "" for ch in strn: lower += tolower(ch) return lower Then you can write the new function in a similar way to the function toLowerstr but where you test if the character is a lowercase letter, uppercase, and other. Lowercase letters are just added, uppercase letters are converted to lowercase and then added, and everything else is not added to the new string,

Thanks in advance!

Answer 1

Python 3.6.2 Shell File Edit Shell Debug Options Window Help Python 3.6.2 (v3.6.2:5fd33b5, Jul 8 2017, 04:14:34) [MSC V. on win32 Type "copyright", "credits" or "license ()" for more informat >>> ======================== RESTART: C:/Users/delll/a.py ====== hellouser >>> | File Edit Format Run Options Window Help import string def isLower (ch): return 'a'<=ch and ch<='z' def isUpper (ch): return 'A'<=ch and ch<='z' def toLower (ch): if isUpper (ch): return chr(ord (ch) +32) else: return ch def toLowerStr(strn): for cc in strn: if cc in string.punctuation: strn=strn.replace (cc,"") for cc in strn: if cc.isdigit(): strn=strn.replace(cc,"") for cc in strn: if CC==" ": strn=strn.replace (cc,"") lower="" for ch in strn: lower+=toLower (ch) return lower print (toLowerStr("Hello, User 15!")) 6:53 AM 03-Oct-19

editable code is given below but to maintain indentation please refer to image of code

import string
def isLower(ch):
return 'a'<=ch and ch<='z'
def isUpper(ch):
return 'A'<=ch and ch<='Z'
def toLower(ch):
if isUpper(ch):
return chr(ord(ch)+32)
else:
return ch
def toLowerStr(strn):
for cc in strn:
if cc in string.punctuation:
strn=strn.replace(cc,"")
for cc in strn:
if cc.isdigit():
strn=strn.replace(cc,"")
for cc in strn:
if cc==" ":
strn=strn.replace(cc,"")
lower=""
for ch in strn:
lower+=toLower(ch)
return lower
print(toLowerStr("Hello, User 15!"))