qq_32273965的博客

def fill_params(sql, params={}): if not params: assert '${' not in sql return sql for n, v in params.items(): n = n.replace('_', '\\_') pattern = re.compile(rf'\${{{n}}}') sql = re.sub(pattern, str(v), sql)

#-*- encoding:utf-8 -*-import numpy as npimport pandas as pdimport matplotlib.pyplot as pltimport seaborn as sns#散点图# 数据准备N = 10x = np.random.randn(N)y = np.random.randn(N)# 用Matplotlib画散点图plt.scatter(x, y,marker='x')plt.show()# 用Seaborn画散点图

#-*- encoding:utf-8 -*-import numpy as npimport pandas as pdfrom pandas import Series, DataFrame#认识Seriesx1 = Series([1, 2, 3])print(x1)x2 = Series([1, 2, 3],index=["a", "b", "c"])print(x2)d = {'a': 3, 'b': 2, 'c': 1}x3 = Series(d)print(x3)#认识

#-*- encoding:utf-8 -*-#创建数据import numpy as npa = np.array([1, 2, 4])b = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])b[1, 2] = 99#获取数组的大小print a.shapeprint b.shape#获取数组的类型print a.dtypeprint b#创建结构数组persontype = np.dtype({ 'names': ['name',

Django的基础命令：1、新建一个Django Projectdjango-admin startproject [project_name] 注：所有路径不要有中文2、新建一个App应用python manage.py startapp [app_name]3、创建数据库表或者更新数据库表1. 创建更改的迁移文件python manage.py makemig...

1、位置参数python函数中的位置参数和java函数是一个意思，比如现在我们计算2+3： def add(a,b): return a+b print add(2,3) >>52、默认参数顾名思义，就是在定义函数的时候给属性添加默认值呗 def add(a,b=8): return a+b ...