源码：
#打印‘1’到‘Z’
print('打印‘1’到‘Z’:')
def printChars(ch1,ch2,numberPerLine):
counter = 0
for i in range(ord(ch1), ord(ch2) + 1):
if chr(i).isalnum():
print(chr(i), end='')
counter+=1
if counter % numberPerLine == 0:
print()
def main():
printChars("1","Z",10)
main()
结果：
