Python，在原基础上修改，首字母大写（即P），其他小写

s = "Python,,PyThin,,PYthen,pYThon,pyThon"
s = s.replace(",", " ")
result =''.join( map(lambda x: x.title(), s.split()))
print(result)

s = "Python,,PyThin,,PYthen,pYThon,pyThon"
s1 = s.split(",")
s2 = ''.join(s1)

for i in range(len(s2)):
    if i % 6 == 0:
        s2 = s2[:i] + s2[i].upper() + s2[i+1:]
    else:
        s2 = s2[:i] + s2[i].lower() + s2[i+1:]
print(s2)