how to remove url in python colab?

I am doing data cleaning for my dataset.
How to remove the link "pic.twitter.com…." in Python for colab?
here’s the picture of the link I want to remove

Any suggestions are much appreciated. Thanks.

#remove other links
def removelinks(text):
  
**  links = re.sub(r'????')**
  return links.sub(r'',text)
  train_df['clean tweet']= train_df['clean tweet'].apply(lambda x:  removelinks(x))
train_df.head()

>Solution :

You can try (regex101):

df['clean tweet'] = df['clean tweet'].str.replace(r'pic\.twitter\.com\S*\s*', '', regex=True)
print(df)

Prints:

   clean tweet
0  some tweet1
1  some tweet2
2  some tweet3

Initial df:

                             clean tweet
0                            some tweet1
1  pic.twitter.com/some_link some tweet2
2                            some tweet3