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RSS订阅原创 pandas的分组与聚合
join merge 题目：统计电影分类(genre)的情况 P125 获取最初数据->tolist->将数据平铺 !!!两个循环->set去重且list->构造一个全0数组(行和列的取值！！)-->对号入座，找到位置，替换成1，进行列求和 #统计分类的列表 datalist2=df["Genre"].str.split(", ").tolist() print(datalist2) # 将数据平铺 datalist=[j for i in data...
2021-09-15 22:34:07
372
原创 pandas基础操作
易错点1： import pandas as pd data=pd.read_csv("dogNames2.csv") print(data) data[800<data["Count_AnimalName"]<10000] print(data[800<data["Count_AnimalName"]<10000]) 报错：The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), .
2021-09-14 20:56:51
136
原创 numpy笔记01
索引和切片 取单行 import numpy as np us_file_path = "youtube_video_data/GB_video_data_numbers.csv" uk_file_path = "youtube_video_data/US_video_data_numbers.csv" #dtype="int"指定类型 unpack=True转置 delimiter=","分割 t1 = np.loadtxt(us_file_path,delimiter=",",dtype=
2021-09-12 18:36:21
172
原创 matplotlib02（条形图和直方图）
rom matplotlib import pyplot as plt import random import matplotlib from matplotlib import font_manager f1=font_manager.FontProperties(fname=r"C:/Windows/Fonts/simsun.ttc") a = ["战狼2","速度与激情8","功夫瑜伽","西游伏妖篇","变形金刚5：最后的骑士","摔跤吧！爸爸","加勒比海盗5：死无对证","金刚：骷髅岛".
2021-09-12 12:14:29
145
原创 matplotlib01
x and y must have same first dimension, but have shapes (119,) and (120,) 解决方法：保证维度相同 import random from matplotlib import pyplot as plt # x表示时间120分钟 x = range(1,120) 此处修改为121 y = [random.randint(20,35) for i in range(120)] plt.figure(figsize=(20,8.
2021-09-08 23:00:10
324
原创 学习笔记01-0907
class Employee: def __init__(self,name,age): self.name = name self.__age = age #此处为双下划线 a = Employee("XXX",18) print(a.name) print(dir(a)) print("获取self._age 私有属性") print(a._Employee__age) 报错显示： ...
2021-09-07 20:46:38
117
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