def strUpLow(s):
n = 0
for a in s:
if n == 0:
b = s[n].upper()
else:
b += s[n].lower()
n += 1
print b
测试:
def strUpLow(s):
n = 0
for a in s:
if n == 0:
b = s[n].upper()
else:
b += s[n].lower()
n += 1
print b
测试: