如何在熊貓表中刪除重復項？

Question

我對編碼非常陌生，並且希望代碼計算單詞的頻率，但我被阻止了，因為我不確定如何刪除重復項。

txt = " remember all those walls we built remember those times"
words = txt.split()
for word in words:
    print (word + " " + str(txt.count(word)))
import pandas as pd
my_table = pd.DataFrame()
for word in words:
    tempdf = pd.DataFrame ({"word" : [word], "frequency" : [txt.count(word)]})
    my_table = my_table.append(tempdf)
print(my_table)

Answer 1

你需要：

txt = " remember all those walls we built remember those times"

words = txt.split()

for word in words:

    print(word + " " + str(txt.count(word)))

import pandas as pd

mytable = pd.DataFrame()

for word in words:

    tempdf = pd.DataFrame ({"word" : [word], "frequency" : [txt.count(word)]})
    mytable = mytable.append(tempdf)

print(mytable)

或使用pd.concat更好：

import pandas as pd
txt = " remember all those walls we built remember those times"
words = txt.split()
for word in words:
    print(word + " " + str(txt.count(word)) )

my_table=pd.concat([pd.DataFrame ({"word" : [word], "frequency" : [txt.count(word)]}) for word in words])
print(mytable)

---

請記住，您還可以update字典，然后在最后創建 dataframe

Answer 2

您需要在第 4 行添加一個額外的右括號，並在第 5 行添加 import pandas as pd 因為您使用的是 pd 而不是 pandas

Answer 3

您的語法錯誤是由於在 import print import pandas as pd之前的行上缺少右括號 ( ) )。 此行應為：

print(word + " " + str(txt.count(word)))

作為語法錯誤的一般提示，首先檢查前一行或前面的 function 調用是否缺少括號或額外的括號。