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HomeSoftware EngineeringLearn how to Repair String Casing in Python

# Learn how to Repair String Casing in Python

## The problem#

You’ll be given a string that will have combined uppercase and lowercase letters and your process is to transform that string to both lowercase solely or uppercase solely based mostly on:

• make as few adjustments as potential.
• if the string comprises equal variety of uppercase and lowercase letters, convert the string to lowercase.

For instance:

``````clear up("coDe") = "code". Lowercase characters > uppercase. Change solely the "D" to lowercase.
clear up("CODe") = "CODE". Uppercase characters > lowecase. Change solely the "e" to uppercase.
clear up("coDE") = "code". Higher == lowercase. Change all to lowercase.
``````

## The answer in Python code#

Choice 1:

``````def clear up(s):
decrease = 0

for c in checklist(s):
if c.decrease()==c:
decrease += 1

return s.decrease() if decrease>=len(s)/2 else s.higher()
``````

Choice 2:

``````def clear up(s):
return (s.decrease, s.higher)[sum(map(str.isupper, s)) > len(s) / 2]()
``````

Choice 3:

``````def clear up(s):
higher = 0
decrease = 0

for char in s:
if char.islower():
decrease += 1
else:
higher += 1

if higher == decrease or decrease > higher:
return s.decrease()
else:
return s.higher()
``````

## Check circumstances to validate our answer#

``````take a look at.it("Fundamental exams")
take a look at.assert_equals(clear up("code"),"code")
take a look at.assert_equals(clear up("CODe"),"CODE")
take a look at.assert_equals(clear up("COde"),"code")
take a look at.assert_equals(clear up("Code"),"code")
``````
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