Question

这似乎是一个很容易的问题，但我在完成这个问题时遇到了麻烦。其他线程谈论匹配和RE模块，但我不能让它工作。

def get_lead_state():
    print ""
    lead_state = raw_input("    Enter the lead's two letter state abbreviation ")
    lead_state = lead_state.upper()
    if None == re.match("[AL,AK,AZ,AR,CA,CO,CT,DE,FL,GA,HI,ID,IL,IN,IA,KS,KY,LA,ME,MD,MA,MI,MN,MS,MO,MT,NE,NV,NH,NJ,NM,NY,NC,ND,OH,OK,OR,PA,RI,SC,SD,TN,TX,UT,VT,VA,WA,WV,WI,WY]", lead_state):
        print ""
        print " == msg ==> ERROR! abbreviation not recognized!"
        print " == msg ==> Try again"
        lead_state = get_lead_state()

    return lead_state

出于某种原因，这允许通过ZZ或VTA等输入。我也尝试将^放在缩写列表之前，我尝试将*和$放在最后。我不确定为什么我不能让这个工作。

- 另外，如果找到匹配项，为什么re.match不返回True

Answer 1

您可以使用set这样的

valid = {"AL","AK","AZ","AR","CA","CO","CT","DE","FL","GA","HI","ID","IL","IN","IA","KS","KY","LA","ME","MD","MA","MI","MN","MS","MO","MT","NE","NV","NH","NJ","NM","NY","NC","ND","OH","OK","OR","PA","RI","SC","SD","TN","TX","UT","VT","VA","WA","WV","WI","WY"}
if not lead_state.upper() in valid:

Answer 2

r'[AL，AK]'表示匹配一个字符，即A，L，逗号，A，或 K等等。

只需使用查找列表：

states = ["AL", "AK", "AZ", "AR", "CA", "CO", "CT", "DE", "FL", "GA", "HI",
          "ID", "IL", "IN", "IA", "KS", "KY", "LA", "ME", "MD", "MA", "MI",
          "MN", "MS", "MO", "MT", "NE", "NV", "NH", "NJ", "NM", "NY", "NC",
          "ND", "OH", "OK", "OR", "PA", "RI", "SC", "SD", "TN", "TX", "UT",
          "VT", "VA", "WA", "WV", "WI", "WY"]
if lead_state.upper().strip() not in states:
    print " == msg ==> ERROR! abbreviation not recognized!"

如何将用户输入状态缩写与拒绝或接受匹配的缩写列表？

2 个答案: