Python Pandas

Python Pandas at a Glance

Pandas Author :	Wes McKinney
About Pandas	pandas is a software library written for the Python programming language for data manipulation and analysis.
NumPy Array :	contains values of the same/homogeneous type
Create empty array of size m x n	numpy.empty ([m ,n])
create a 1D array using arrange function of size N	arr = np.arrange(N)
Default Data Type of Array	float64
Creating Series with NaN Values	obj = pd.Series([2 , 5, np.Nan , 4])
Series :	one-dimensional array-like object (containing an array of data and an associated array of data labels, called its index)
To fetch first n rows from pandas object P	P.head(n)
To fetch last n rows from a pandas object P.	P.tail(n)
To retrieve dimensions (shape) of Series Object	P.shape()
To create M x M identity matrix	np.eye(M)