使用条件删除 Python DataFrame 行中的行

Question

I'm trying to remove rows of data that I don't need after importing from files and concatenating my list of dataframes. Here is what my current DataFrame looks like:

                            Best Movie
0                        Movie: Orphan
1                                   2.
2                        Movie: Avatar
3                                   3.
4          Movie: Inglourious Basterds
...                                ...
2371  Movie: The Deep End of the Ocean
2372                               49.
2373         Movie: Drop Dead Gorgeous
2374                               50.
2375                         Movie: Go

I need to remove all rows with just the number in them so result looks like this:

                            Best Movie
0                        Movie: Orphan
2                        Movie: Avatar
4          Movie: Inglourious Basterds
...                                ...
2371  Movie: The Deep End of the Ocean
2373         Movie: Drop Dead Gorgeous
2375                         Movie: Go

Thank you for your help

Answer 1

One solution using str.match

mask = ~df["Best Movie"].str.match(r"^\s*\d+\.$")
res = df[mask]
print(res)

Output

                         Best Movie
0                     Movie: Orphan
2                     Movie: Avatar
4       Movie: Inglourious Basterds
5  Movie: The Deep End of the Ocean
7         Movie: Drop Dead Gorgeous
9                         Movie: Go

UPDATE

To replace "Movie:" and reset the index, do:

res = df[mask].reset_index()
res = res["Best Movie"].str.replace(r"^\s*Movie:", "", regex=True)
print(res)

Output

0                        Orphan
1                        Avatar
2          Inglourious Basterds
3     The Deep End of the Ocean
4            Drop Dead Gorgeous
5                            Go
Name: Best Movie, dtype: object

Answer 2

You can do:

df.loc[~df['Best Movie'].str.match('^\d+.$')]

Answer 3

Sample input

df = pd.DataFrame({
    
    "Best_Movie": ["Movie: Orphan", "2.", "Movie: Avatar", "3."]
})

apply pd.to_numeric. the rows with only numbers will be converted to float and others will be marked as NaN.

df["nums"] = pd.to_numeric(df['Best_Movie'], errors='coerce')

extract rows which has text (ie rows marked as nan )

df.loc[df.nums.isnull(), "Best_Movie"]

Sample output

0    Movie: Orphan
2    Movie: Avatar
Name: Best_Movie, dtype: object

Answer 4

Try the following. '|' is basically means or in this case

df[~df['Best Movie'].str.contains('|'.join(str(i) for i in range(10)))]