python - 为什么我的elif语句出现语法错误？

Question

下面是我的代码的副本。我一直收到elif centralLat和centralLong的语法错误。我不明白为什么。我正确地缩进了一切。首先是EasternLat和EasternLong的作品。为什么centralLong和centralLat等的elif语句不起作用？

对于此作业，我必须检查特定时区的每个纬度和经度，并计算该时区的幸福分数。该幸福分数是时区中推文的情感值的总和除以时区中推文的数量。

为什么我总是出错？

for line in infile2:
        line=line.rstrip()
        words=line.split()
        firststriplat=words[0].rstrip(",")
        lat=firststriplat.lstrip("[")
        lat=float(lat)
        long=words[1].rstrip("]")
        long=float(long)
        easternLat= 24.660845 <= lat and lat<=49.189787
        easternLong= -87.518395 <= long <= -67.444574
        centralLat= 24.660845 <= lat and lat<=49.189787
        centralLong= -101.998892 <= long <= -87.518395
        mountainLat=24.660845 <= lat and lat<=49.189787
        mountainLong=-115.236428 <= long <= -101.998892
        pacificLat=24.660845 <= lat and lat<=49.189787
        pacificLong= -125.242264<= long <= -115.236428
        if easternLat and easternLong:
            for word in words:
                if word in depressed:
                    depressedKeys=depressedKeys+1
                elif word in okay:
                    okayKeys=okayKeys+1
                elif word in good:
                    goodKeys=goodKeys+1
                elif word in happy:
                    happyKeys=happyKeys+1
                else:
                    pass
        numOfTweetsEastern=numOfTweetsEastern+1
        sentimentValueEastern=(depressedKeys*DEPRESSEDVALUE)+(okayKeys*OKAYVALUE)+(goodKeys*GOODVALUE)+(happyKeys*HAPPYVALUE)
        elif centralLat and centralLong:
            for word in words:
                if word in depressed:
                    depressedKeys=depressedKeys+1
                elif word in okay:
                    okayKeys=okayKeys+1
                elif word in good:
                    goodKeys=goodKeys+1
                elif word in happy:
                    happyKeys=happyKeys+1
                else:
                    pass
        numOfTweetsCentral=numOfTweetsCentral+1
        sentimentValueCentral=(depressedKeys*DEPRESSEDVALUE)+(okayKeys*OKAYVALUE)+(goodKeys*GOODVALUE)+(happyKeys*HAPPYVALUE)
        elif mountainLat and mountainLong:
             for word in words:
                if word in depressed:
                    depressedKeys=depressedKeys+1
                elif word in okay:
                    okayKeys=okayKeys+1
                elif word in good:
                    goodKeys=goodKeys+1
                elif word in happy:
                    happyKeys=happyKeys+1
                else:
                    pass
        numOfTweetsMountain=numOfTweetsMountain+1
        sentimentValueMountain=(depressedKeys*DEPRESSEDVALUE)+(okayKeys*OKAYVALUE)+(goodKeys*GOODVALUE)+(happyKeys*HAPPYVALUE)
        elif pacificLat and pacificLong:
            for word in words:
                if word in depressed:
                    depressedKeys=depressedKeys+1
                elif word in okay:
                    okayKeys=okayKeys+1
                elif word in good:
                    goodKeys=goodKeys+1
                elif word in happy:
                    happyKeys=happyKeys+1
                else:
                    pass
        numOfTweetsPacific=numOfTweetsPacific+1
        sentimentValuePacific=(depressedKeys*DEPRESSEDVALUE)+(okayKeys*OKAYVALUE)+(goodKeys*GOODVALUE)+(happyKeys*HAPPYVALUE)
        else:
            pass
    happScoreEastern=sentimentValueEastern/numOfTweetsEastern
    happScoreCentral=sentimentValueCentral/numOfTweetsCentral
    happScoreMountain=sentimentValueMountain/numOfTweetsMountain
    happScorePacific=sentimentValuePacific/numOfTweetsPacific
    print(happScoreEastern)
    print(happScoreCentral)
    print(happScoreMountain)
    print(happScorePacific)

Answer 1

让我们拿一小部分代码。

1    if easternLat and easternLong:
2        for word in words:
3            ...
4    numOfTweetsEastern=numOfTweetsEastern+1
5    sentimentValueEastern=(depressedKeys*DEPRESSEDVALUE)+(okayKeys*OKAYVALUE)+(goodKeys*GOODVALUE)+(happyKeys*HAPPYVALUE)
6    elif centralLat and centralLong:
7        for word in words:
8            ...

这是一个 if语句(第1行)，其中包含一个for循环(2)。
然后在 if语句之后是两行(4和5)。
然后是 elif语句(6)。

这些行(第4和第5行)阻止 elif与 if配对。

如果这些行(第4和第5行)应该是 if语句的一部分，则应相应地对其进行缩进。

1    if easternLat and easternLong:
2        for word in words:
3            ...
4        numOfTweetsEastern=numOfTweetsEastern+1
5        sentimentValueEastern=(depressedKeys*DEPRESSEDVALUE)+(okayKeys*OKAYVALUE)+(goodKeys*GOODVALUE)+(happyKeys*HAPPYVALUE)
6    elif centralLat and centralLong:
7        for word in words:
8            ...

这将产生有效的 if/elif结构。