Python Change Pandas DataFrame Variables: String to Float

PandasChange.md

# Python Change Pandas DataFrame Variables

import pandas as pd

data = [['hello', '1.222', '4', '5.22'], ['world', '66', '4', '6.33'], ['hello', '4.22', '0', '5.24']]
data = pd.DataFrame(data, columns = ['a', 'b', 'c', 'd'])
data

	a	b	c	d
0	hello	1.222	4	5.22
1	world	66	4	6.33
2	hello	4.22	0	5.24

data.dtypes

a    object
b    object
c    object
d    object
dtype: object

data.a[0] + " "  + data.a[1]

'hello world'

data[['b', 'd']] = data[['b', 'd']].astype(float)
data[['c']] = data[['c']].astype(int)
data[['a']] = data[['a']].astype(str) # Defaults to string
data

	a	b	c	d
0	hello	1.222	4	5.22
1	world	66.000	4	6.33
2	hello	4.220	0	5.24

data.dtypes

a     object
b    float64
c      int32
d    float64
dtype: object

data.a[0] + " "  + data.a[1]

'hello world'