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return first n rows of df

DataFrame.head( n = 5)
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Returns the first n rows

# Returns the first n rows

df.head()
# Row(age=2, name=u'Alicz')
df.head(1)
# [Row(age=2, name=u'Alice')]
Comment

Returns the first row as a Row

# Returns the first row as a Row

df.first()
# Row(age=2, name=u'Alice')
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