## 第一題：
第一關地址：[http://www.pythonchallenge.com/pc/def/map.html](http://www.pythonchallenge.com/pc/def/map.html)
```
from os.path import join
old_text = "g fmnc wms bgblr rpylqjyrc gr zw fylb. rfyrq ufyr amknsrcpq ypc dmp. bmgle gr gl zw fylb gq glcddgagclr ylb rfyr'q ufw rfgq rcvr gq qm jmle. sqgle qrpgle.kyicrpylq() gq pcamkkclbcb. lmu ynnjw ml rfc spj."
#old_text = "xyz"
new_text = list(old_text)
str_str = '' # 中間轉換用的單個字符串
str_int = 0 # 中間轉換用的ascii碼值
for i in range(len(old_text)):
print(old_text[i]) # 將拆分后的每一個字符轉換為acdii碼值
if 97 <= ord(old_text[i]) <= 122: # a = 97,z = 122
str_int = ord(old_text[i]) + 2
if str_int > 122:
str_int -= 26 # 122-97 = 25 ，+1 = 26
str_str = chr(str_int)
new_text[i] = str_str
print(''.join(new_text))
```
