A function must have as many arguments as defined. If the number of arguments is less or more it will give an error.
def name_function(firstname, lastname):
print(firstname + ” “ + lastname)
name_function(“Raj”, “Kumar”)
Arguments in Python
Arguments are passed inside parentheses.
def our_second_function(firstname):
print(firstname + “Raj”)
our_second_function(“Mohan”)
our_second_function(“Narasimha”)
our_second_function(“Krishna”)
There can be as many arguments as required, separated by a comma(,).
Calling a function in Python
def our_first_function():
print(“Hello enterprising people”)our_first_function()
In the above example, def is a keyword.
It is used to define a function.
Python Functions
PySparkShell application UI
Simple linear regression
y = mx + c
y – Dependent variable(DV)
x – Independent variable(IV)
c – constant
Filling missing data using scikit
from sklearn.impute import SimpleImputer
We are importing the simple imputer from scikit library.
imputer = SimpleImputer(missing_values=np.nan, strategy=’mean’)
The strategy used is mean, where the missing data is replaced by average of the values.
imputer.fit(X[:, 1:3])
The number of columns on which the above function is used is 2 i.e between 1 and 3.
X[:, 1:3] = imputer.transform(X[:, 1:3])
The new column is again assigned to the 2 columns.
Importing dataset in Python
dataset = [library alias name].read_csv(‘file.csv’)
x = dataset.iloc[:,:-1].values
y = dataset.iloc[:, -1].values
In the above lines, read_csv and iloc are functions.
[:,:-1] is slicing range of the values.
Importing libraries in Python
Syntax
import [library] as []
Python Post for the day – 7th October 2019
Basic operations
a=10 b=5 add = a+b sub = a-b mul = a*b div = a/b mod = a%b print(add) print(sub) print(mul) print(div) print(mod)