[Pandas][Series]S1_11_Indexing

prices.csv

3.09MB

 

 

In [1]:

import pandas as pd

 

In [6]:

prices = pd.read_csv('/content/sample_data/prices.csv', squeeze=True); prices

 

Out[6]:

0          2.55
1          3.39
2          2.75
3          3.39
4          3.39
          ...  
541905     2.10
541906     4.15
541907     4.15
541908     4.95
541909    18.00
Name: Price, Length: 541910, dtype: float64

 

In [3]:

# the first element in a Pandas Series
# ★ index starts from zero!
prices[0]

 

Out[3]:

2.55

 

In [12]:

# the fifth element in a Pandas Series
# specific index = Ordinal Number(순서) - 1
prices[4]

 

Out[12]:

3.39

 

In [7]:

# the last element in a Pandas Serie
# the last indexing = Length - 1 because of starting from zero
prices[541909] 

 

Out[7]:

18.0

 

In [11]:

prices[len(prices)-1]

 

Out[11]:

18.0