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pandas drop empty columns Code Example
pandas drop empty columns 
DataFrameName.dropna(axis=1, how='all', inplace=True)
remove rows or columns with NaN value 
df.dropna()     #drop all rows that have any NaN values
df.dropna(how='all')
Source: stackoverflow.com
Returns a new DataFrame omitting rows with null values 
# Returns a new DataFrame omitting rows with null values

df4.na.drop().show()
# +---+------+-----+
# |age|height| name|
# +---+------+-----+
# | 10|    80|Alice|
# +---+------+-----+
Source: spark.apache.org



Python

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