方法与包

面向 MATLAB 用户的 Python

Justin Kiggins

Product Manager

方法是附加在变量上的函数

针对变量类型
用句点访问

yelling = "WHY ARE YOU YELLING?"
whispering = yelling.lower()
print(whispering)

why are you yelling?

.format() 方法

n_avocados = 1765
message = "I have {} avocados!".format(n_avocados)

print(message)

I have 1765 avocados!

Python 包

NumPy 标志

matplotlib 标志

pandas 标志

import math

math.pi

3.141592653589793

math.log(0.9)

-0.10536051565782628

Importing part of a package:

from math import log
log(0.9)

-0.10536051565782628

包的别名

import datetime as dt

birth_date = dt.datetime(1961,8,4)

# Import NumPy package with common alias
import numpy as np
x = np.ndarray([1, 2, 3])

# Import pandas package with common alias
import pandas as pd
df = pd.DataFrame()

# Import Matplotlib pyplot module with common alias
import matplotlib.pyplot as plt
plt.show()

# Import Seaborn package with common alias
import seaborn as sns
sns.set_theme()

来看一些常用方法与包

面向 MATLAB 用户的 Python