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Python最常用的20 个包总结

作者:不吃西红柿丶

这篇文章主要介绍了Python最常用的20 个包总结,在平时使用Python的过程中,需要用到很多有用的包,今天就来盘点一下常用的包,需要的朋友可以参考下

numpy(数据处理和科学计算)

代码示例:

arr = np.array([1, 2, 3, 4, 5])
print(arr)

pandas(数据处理和分析)

代码示例:

data = {'name': ['John', 'Bob', 'Alice'], 'age': [20, 35, 25]}
df = pd.DataFrame(data)
print(df)

matplotlib(数据可视化)

代码示例:

import matplotlib.pyplot as plt

x = [1, 2, 3, 4, 5]
y = [4, 2, 7, 5, 9]
plt.plot(x, y)
plt.show()

scikit-learn(机器学习工具)

代码示例:

from sklearn.linear_model import LinearRegression

X = [[1, 4], [2, 5], [3, 6]]
y = [8, 10, 12]
model = LinearRegression().fit(X, y)
print(model.predict([[4, 7]]))

tensorflow(深度学习框架)

代码示例:

import tensorflow as tf

x = tf.constant([1, 2, 3, 4])
y = tf.constant([5, 6, 7, 8])
z = tf.add(x, y)
sess = tf.Session()
print(sess.run(z))

keras(深度学习框架)

代码示例:

from keras.models import Sequential
from keras.layers import Dense

model = Sequential()
model.add(Dense(10, input_dim=5, activation='relu'))
model.add(Dense(1, activation='sigmoid'))
model.compile(loss='binary_crossentropy', optimizer='adam')

requests(HTTP 库)

代码示例:

import requests

response = requests.get('https://www.baidu.com')
print(response.text)

flask(Web 框架)

代码示例:

from flask import Flask, render_template

app = Flask(**name**)

@app.route('/')
def index():
return render_template('index.html')

if **name** == '**main**':
app.run(debug=True)

scrapy(网络爬虫框架)

代码示例:

import scrapy

class MySpider(scrapy.Spider):
name = 'myspider'
start_urls = ['http://quotes.toscrape.com']

    def parse(self, response):
        for quote in response.css('div.quote'):
            yield {'text': quote.css('span.text::text').get(),
                   'author': quote.css('span small::text').get()}

beautifulsoup(HTML 解析器)

代码示例:

from bs4 import BeautifulSoup

html = '<html><head><title>这是标题</title></head><body><p>这是一个段落。</p ></body></html>'
soup = BeautifulSoup(html, 'html.parser')
print(soup.title.text)

selenium(Web 自动化测试)

代码示例:

from selenium import webdriver

driver = webdriver.Chrome()
driver.get('https://www.baidu.com')
search_box = driver.find_element_by_name('wd')
search_box.send_keys('Python')
search_box.submit()

ctypes(调用 C 语言库)

代码示例:

import ctypes

lib = ctypes.cdll.LoadLibrary('libexample.so')
lib.add(1, 2)

wxPython(GUI 开发)

代码示例:

import wx

app = wx.App()
frame = wx.Frame(None, title='Hello, wxPython!')
frame.Show()
app.MainLoop()

pillow(图像处理)

代码示例:

from PIL import Image

im = Image.open('test.jpg')
im.show()

openpyxl(处理 Excel 文件)

代码示例:

import openpyxl

wb = openpyxl.load_workbook('example.xlsx')
sheet = wb['Sheet1']
cell = sheet['A1']
print(cell.value)

nltk(自然语言处理)

代码示例:

import nltk

sent = ‘This is a sentence.'
tokens = nltk.word_tokenize(sent)
print(tokens)

jieba(中文分词)

代码示例:

import jieba

text = '我爱中文分词'
words = jieba.cut(text)
for word in words:
print(word)

re(正则表达式)

代码示例:

import re

text = 'The quick brown fox jumps over the lazy dog.'
pattern = re.compile('fox')
print(pattern.findall(text))

datetime(日期时间处理)

代码示例:

import datetime

dt = datetime.datetime.now()
print(dt)

random(随机数生成)

代码示例:

import random
print(random.randint(1, 10))

到此这篇关于Python最常用的20 个包总结的文章就介绍到这了,更多相关Python常用包内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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