Left join

Menggabungkan Data dengan pandas

Aaren Stubberfield

Instructor

Tinjauan cepat

Diagram Venn inner join

Left join

Diagram Venn left join

Left join

Gambar dua tabel digabung dengan left join

Dataset baru

Logo Movie DB

Kolase poster film

Tabel Movies

movies = pd.read_csv('tmdb_movies.csv')
print(movies.head())
print(movies.shape)

  id     original_title   popularity       release_date
0 257    Oliver Twist     20.415572        2005-09-23  
1 14290  Better Luck ...  3.877036         2002-01-12  
2 38365  Grown Ups        38.864027        2010-06-24  
3 9672   Infamous         3.6808959999...  2006-11-16  
4 12819  Alpha and Omega  12.300789        2010-09-17  
(4803, 4)

Tabel Tagline

taglines = pd.read_csv('tmdb_taglines.csv')
print(taglines.head())
print(taglines.shape)

  id      tagline
0 19995   Enter the World of Pandora.
1 285     At the end of the world, the adventure begins.
2 206647  A Plan No One Escapes
3 49026   The Legend Ends
4 49529   Lost in our world, found in another.
(3955, 2)

Merge dengan left join

movies_taglines = movies.merge(taglines, on='id', how='left')
print(movies_taglines.head())

  id     original_title   popularity       release_date  tagline        
0 257    Oliver Twist     20.415572        2005-09-23    NaN            
1 14290  Better Luck ...  3.877036         2002-01-12    Never undere...
2 38365  Grown Ups        38.864027        2010-06-24    Boys will be...
3 9672   Infamous         3.6808959999...  2006-11-16    There's more...
4 12819  Alpha and Omega  12.300789        2010-09-17    A Pawsome 3D...

Jumlah baris yang dihasilkan

print(movies_taglines.shape)

(4805, 5)

Ayo berlatih!

Menggabungkan Data dengan pandas