解释一下counts[rword] = counts.get(rword,0) + 1

这行代码中，counts是一个字典，rword是一个字符串变量。counts.get(rword, 0)是一个字典方法，它会返回rword在counts中的值，如果rword不在counts中，则返回0。

counts[rword] = counts.get(rword, 0)则是将counts字典中rword的计数值设置为counts.get(rword, 0)的返回值。如果rword已经存在于counts字典中，则counts[rword]的值会被更新为counts.get(rword, 0)的返回值；如果rword不存在于counts字典中，则counts[rword]会被设置为0。

这行代码的作用是将rword的计数值加1，即使rword已经存在于counts字典中，也可以保证代码不会出现KeyError错误。

相关问题

counts[rword]=counts.get(rword,0)+1

这是一个Python字典的操作，它将rword添加到counts字典中，并将它的值加1。如果rword已经存在于counts字典中，则将其对应的值加1；否则，将其添加到counts字典中，并将其值初始化为1。

这段代码可以用来统计一个文本中每个单词出现的次数。例如：

text = "this is a sample text for testing"
words = text.split()
counts = {}
for word in words:
    rword = word.lower()
    counts[rword] = counts.get(rword, 0) + 1
print(counts)

这个例子中，我们首先将文本拆分成单词，并将它们存储在一个列表中。然后，我们遍历列表中的所有单词，将它们转换为小写字母，并将它们添加到counts字典中。最后，我们输出counts字典，它会显示每个单词出现的次数。

import jieba import wordcloud def takeSecond(elem): return elem[1] def createWordCloud(text): w=wordcloud.WordCloud (font_path="msyh.ttf",width=1000,height=500,background_color="white").generate(text) w.to_file("西游记词云图.jpg") def main(): path = "西游记.txt" file = open(path,"r",encoding="utf-8") text=file.read() file.close() words = jieba.lcut(text) counts = {} for word in words: if len(word) == 1: continue elif word == "大圣" or word=="老孙" or word=="行者" or word=="孙大圣" or word=="孙行者" or word=="猴王" or word=="悟空" or word=="齐天大圣" or word=="猴子": rword = "孙悟空" elif word == "师父" or word == "三藏" or word=="圣僧": rword = "唐僧" elif word == "呆子" or word=="八戒" or word=="老猪": rword = "猪八戒" elif word=="沙和尚": rword="沙僧" elif word == "妖精" or word=="妖魔" or word=="妖道": rword = "妖怪" elif word=="佛祖": rword="如来" elif word=="三太子": rword="白马" else: rword = word counts[rword] = counts.get(rword,0) + 1 file = open("excludes.txt","r",encoding="utf-8") excludes =file.read().split(",") file.close for delWord in excludes: try: del counts[delWord] except: continue items = list(counts.items()) items.sort(key = takeSecond,reverse=True) for i in range(20): item=items[i] keyWord =item[0] count=item[1] print("{0:<10}{1:>5}".format(keyWord,count)) createWordCloud(str(items[0:20])) main()

在代码中有以下几个错误：

1. 第一行代码应该在同一行，不能出现换。

2. 第二行代码需要加上空格。

3. 第四行代码需要加上空格。

4. 第18行代码需要加上空格。

5. 第27行代码`file.close`后需要加上括号。

6. 第37行代码`file.close`后需要加上括号。

7. 第51行代码的`range(20)`应该改为`range(len(items))`。

8. 第54行代码需要加上括号。

这是修改后的代码：

import jieba
import wordcloud

def takeSecond(elem):
    return elem[1]

def createWordCloud(text):
    w=wordcloud.WordCloud(font_path="msyh.ttf", width=1000, height=500, background_color="white").generate(text)
    w.to_file("西游记词云图.jpg")

def main():
    path = "西游记.txt"
    file = open(path, "r", encoding="utf-8")
    text = file.read()
    file.close()

    words = jieba.lcut(text)
    counts = {}
    for word in words:
        if len(word) == 1:
            continue
        elif word == "大圣" or word == "老孙" or word == "行者" or word == "孙大圣" or word == "孙行者" or word == "猴王" or word == "悟空" or word == "齐天大圣" or word == "猴子":
            rword = "孙悟空"
        elif word == "师父" or word == "三藏" or word == "圣僧":
            rword = "唐僧"
        elif word == "呆子" or word == "八戒" or word == "老猪":
            rword = "猪八戒"
        elif word == "沙和尚":
            rword = "沙僧"
        elif word == "妖精" or word == "妖魔" or word == "妖道":
            rword = "妖怪"
        elif word == "佛祖":
            rword = "如来"
        elif word == "三太子":
            rword = "白马"
        else:
            rword = word
        counts[rword] = counts.get(rword, 0) + 1

    file = open("excludes.txt", "r", encoding="utf-8")
    excludes = file.read().split(",")
    file.close()

    for delWord in excludes:
        try:
            del counts[delWord]
        except:
            continue

    items = list(counts.items())
    items.sort(key=takeSecond, reverse=True)

    for i in range(len(items)):
        item = items[i]
        keyWord = item[0]
        count = item[1]
        print("{0:<10}{1:>5}".format(keyWord, count))

    createWordCloud(str(items[0:20]))

main()