[learn Python from simple to deep] function 5 format function: str.format

One 、 Format output

import numpy as np
print(np.pi)
# Format output {} Represents a placeholder , The results don't show , Internal parameters can be added 
print("pi value :{:.2f}".format(np.pi))

3.141592653589793
pi value :3.14

Two 、 The specified location

# example 2
print(" Big data technology terms :{}h and {}".format("Hadoop","Spark"))

Big data technology terms :Hadooph and Spark

# Appoint value Location 
print(" Big data technology terms :{1} and {0}".format("Hadoop","Spark"))

Big data technology terms :Spark and Hadoop

# Appoint value Specific value 
print(" Website name ：{name}, website ：{site}".format(name="Python",site="www.pyhton.org"))

Website name ：Python, website ：www.pyhton.org

3、 ... and 、 A few cases

1. All lowercase 、 All caps and initials are right name Format the output .

name=input()
print(name.lower())
print(name.upper())
print(name.title())

Input ： niuNiu
Output ：
niuniu
NIUNIU
Niuniu

2. Suppose the input is name by Niuniu, The output I am Niuniu and I am studying Python in Nowcoder! Please output the corresponding English sentence according to the above sentence pattern .

name=input()
print('I am {0} and I am studying Python in Nowcoder!'.format(name))

Input ：
Niuniu
Output ：
I am Niuniu and I am studying Python in Nowcoder!

3. Go to space ：
Input description ：
One string per line represents the name name（ notes ：name With some extra white space on both sides ）.
Output description ：
One line output name The original content after removing the blank characters on both sides .

name = input()
print(name.strip())

Input ：
Niuniu
Output ：
Niuniu