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项目1-Python基础综合训练

json文件的数据格式确定:

版本V1:

{
  "张三":{
  "English": 30.0,
  "Music": 45.56,
  "Chinese": 100.9
    }
}

版本V2:

{
  "Name": "张三",
  "English": 30.0,
  "Music": 45.56,
  "Chinese": 100.9
}

版本V3:

{
  "Name": "张三",
  "Mark":
  {
      "English": 30.0,
      "Music": 45.56,
      "Chinese": 100.9
  }  
}

版本V4:

{
  "Name":"张三",
  "Gender":"male",
  "Age":16,
  "Mark":[
  {
      "Subject":"English",
      "Score": 30.0      
  },
  {
      "Subject":"Music",
      "Score": 30.0      
  },
  {
      "Subject":"Chinese",
      "Score": 30.0      
  }
 ]  
}

版本V4错误格式:

{
  "Name": "张三",
  "Gender":"male",
  "Age":16,
  "Mark":{
    {
        "Subject":"English",
        "Score": 30.0,      
    },
    {
        "Subject":"Music",
        "Score": 30.0  ,    
    },
    {
        "Subject":"Chinese",
        "Score": 30.0,      
    }
  }  
}

版本V5:  stu_mark5.json

[{
  "Name": "张三",
  "Gender":"male",
  "Age":16,
  "Mark":[
  {
      "Subject":"English",
      "Score": 60.0      
  },
  {
      "Subject":"Music",
      "Score": 80.0      
  },
  {
      "Subject":"Chinese",
      "Score": 30.0      
  }
 ]  
},
{
  "Name": "里斯",
  "Gender":"male",
  "Age":15,
  "Mark":[
  {
    "Subject":"English",
    "Score": 90.0   
  },
  {
    "Subject":"Music",
    "Score": 90.0   
  },
  {
    "Subject":"Chinese",
    "Score": 37.0   
  }
 ]  
},
{
  "Name": "王莎莎",
  "Gender":"female",
  "Age":18,
  "Mark":[
  {
    "Subject":"English",
    "Score": 100.0   
  },
  {
    "Subject":"Music",
    "Score": 100.0   
  },
  {
    "Subject":"Chinese",
    "Score": 10.0   
  }
 ]  
}
]

以上版本有一个格式是错误的,其他版本格式都是正确的,都有自身的优点及缺点。

 Python 核心代码:

参考1：

stuDict={"zs":100,"wang":86,"liu":67}
sName=input("请输入学生的名称:")
if(sName not in stuDict):
    print("你输入的学生不在.")
else:
    print("此学生分数为:",stuDict[sName])
 
#print(stuDict.get(sName,"你输入的学生不在."))

参考2:

import json

with open("stu_mark3.json", mode='r', encoding='utf-8') as fp:
    stu_mark=json.load(fp)
    print(stu_mark)
    print(type(stu_mark))

参考3:

import json
stu_mark={}
stu_mark["Name"]=input("Name=")
stu_mark["English"]=float(input("English="))
stu_mark["Music"]=float(input("Music="))
stu_mark["Chinese"]=float(input("Chinese="))
print(stu_mark)
with open("stu_mark.json", mode='w', encoding='utf-8') as fp:
    json.dump(stu_mark, fp,ensure_ascii=False,indent=2)

参考4:

import json

stuList=list()
with open("stu_mark4.json", mode='r', encoding='utf-8') as fp:
    stuList=json.load(fp)
# print(stuList)
for e in stuList:
    print(e["Name"],e["Gender"],e["Age"])
    for s in e["Mark"]:
        print(s["Subject"],s["Score"])
    print("*"*50)

 几个目标: 求最高分,求最低分,求平均分,求排序,求名次,求柱状图。

 参考代码1：

import json

def printStuList(stuList):
    for e in stuList:
        sf=0
        print(e["Name"],e["Gender"],e["Age"],end=' ')
        for s in e["Mark"]:
            print(s["Subject"],s["Score"],end=' ')
            sf+=s["Score"]
        print("Average",sf/3.0,end=' ')
        print("")
        print("*"*50)

stuList=list()
with open("stu_mark5.json", mode='r', encoding='utf-8') as fp:
    stuList=json.load(fp)

printStuList(stuList)
print("\n\n按照年龄排序后:\n")
stuList.sort(key=lambda item:item["Age"])
printStuList(stuList)

print("\n\n按照英语成绩排序后:\n")


stuList.sort(key=lambda item:item["Mark"][0]["Score"])
printStuList(stuList)


print("\n\n按照平均分排序后:\n")
stuList.sort(key=lambda item:(item["Mark"][0]["Score"]+item["Mark"][1]["Score"]+item["Mark"][2]["Score"])/3)
printStuList(stuList)

参考代码2:

import json

def calSum(eJson):
    return eJson["Score"]


def printStuList(stuList):
    for e in stuList:
        sf=0
        print(e["Name"],e["Gender"],e["Age"],end=' ')
        for s in e["Mark"]:
            print(s["Subject"],s["Score"],end=' ')
        sf=sum(list(map(calSum,e["Mark"])))
        print("Sum",sf,end=' ')
        e["Sum"]=sf
        print("")
        print("*"*50)

stuList=list()
with open("stu_mark4.json", mode='r', encoding='utf-8') as fp:
    stuList=json.load(fp)

printStuList(stuList)
print(stuList)
print("\n\n按照年龄排序后:\n")
stuList.sort(key=lambda item:item["Age"])
printStuList(stuList)

print("\n\n按照英语成绩排序后:\n")


stuList.sort(key=lambda item:item["Mark"][0]["Score"])
printStuList(stuList)


print("\n\n按照Sum总分排序后:\n")
stuList.sort(key=lambda item:(item["Sum"]))
printStuList(stuList)

 代码3：

import json
import matplotlib.pyplot as plt

def calSum(eJson):
    return eJson["Score"]


def printStuList(stuList):
    for e in stuList:
        sf=0
        print(e["Name"],e["Gender"],e["Age"],end=' ')
        for s in e["Mark"]:
            print(s["Subject"],s["Score"],end=' ')
        sf=sum(list(map(calSum,e["Mark"])))
        print("Sum",sf,end=' ')
        e["Sum"]=sf
        print("")
        print("*"*50)

stuList=list()
with open("stu_mark4.json", mode='r', encoding='utf-8') as fp:
    stuList=json.load(fp)

printStuList(stuList)
print(stuList)
print("\n\n按照年龄排序后:\n")
stuList.sort(key=lambda item:item["Age"])
printStuList(stuList)

print("\n\n按照英语成绩排序后:\n")


stuList.sort(key=lambda item:item["Mark"][0]["Score"])
printStuList(stuList)


print("\n\n按照Sum总分排序后:\n")
stuList.sort(key=lambda item:(item["Sum"]))
printStuList(stuList)

nameList=list()
sumList=list()
for e in stuList:
    nameList.append(e["Name"])
    sumList.append(e["Sum"])
# nameTuple=tuple(nameList)
nameTuple=tuple()
nameTuple=tuple(nameList)
plt.rcParams['font.sans-serif'] = ['SimHei']
plt.rcParams['axes.unicode_minus'] = False
plt.bar(nameTuple, sumList)
plt.title('总分柱状图')
plt.show()

代码4:

import json
import matplotlib.pyplot as plt
import numpy as np


def calSum(eJson):
    return eJson["Score"]


def printStuList(stuList):
    for e in stuList:
        sf=0
        print(e["Name"],e["Gender"],e["Age"],end=' ')
        for s in e["Mark"]:
            print(s["Subject"],s["Score"],end=' ')
        sf=sum(list(map(calSum,e["Mark"])))
        print("Sum",sf,end=' ')
        e["Sum"]=sf
        print("")
        print("*"*50)

stuList=list()
with open("stu_mark4.json", mode='r', encoding='utf-8') as fp:
    stuList=json.load(fp)

printStuList(stuList)
print(stuList)
print("\n\n按照年龄排序后:\n")
stuList.sort(key=lambda item:item["Age"])
printStuList(stuList)

print("\n\n按照英语成绩排序后:\n")


stuList.sort(key=lambda item:item["Mark"][0]["Score"])
printStuList(stuList)


print("\n\n按照Sum总分排序后:\n")
stuList.sort(key=lambda item:(item["Sum"]))
printStuList(stuList)

nameList=list()
sub1List=list()
sub2List=list()
sub3List=list()
for e in stuList:
    nameList.append(e["Name"])
    sub1List.append(e["Mark"][0]["Score"])
    sub2List.append(e["Mark"][1]["Score"])
    sub3List.append(e["Mark"][2]["Score"])
# nameTuple=tuple(nameList)
nameTuple=tuple()
nameTuple=tuple(nameList)
plt.rcParams['font.sans-serif'] = ['SimHei']
plt.rcParams['axes.unicode_minus'] = False
bar_width=0.3
index0=np.arange(len(sub1List))
index1=index0+bar_width
index2=index1+bar_width


plt.bar(index0,height=sub1List,width=bar_width,color='b',label="English")
plt.bar(index1,height=sub2List,width=bar_width,color='g',label="Music")
plt.bar(index2,height=sub3List,width=bar_width,color='r',label="Chinese")
plt.legend()  # 显示图例
plt.xticks(index0 + bar_width/2, nameList)  # 让横坐标轴刻度显示 waters 里的饮用水， index_male + bar_width/2 为横坐标轴刻度的位置
plt.ylabel('成绩')  # 纵坐标轴标题
plt.title('成绩柱状图')
plt.show()
import json
import matplotlib.pyplot as plt
import numpy as np



def printStuList(stuList):
    for e in stuList:
        sf=0
        print(e["Name"],e["Gender"],e["Age"],end=' ')
        for s in e["Mark"]:
            print(s["Subject"],s["Score"],end=' ')
        sf=sum(list(map(calSum,e["Mark"])))
        print("Sum",sf,end=' ')
        e["Sum"]=sf
        print("")
        print("*"*50)

stuList=list()

with open("stu_mark4.json", mode='r', encoding='utf-8') as fp:
    stuList=json.load(fp)
print(stuList)
# nameList=list()
# sub1List=list()
# sub2List=list()
# sub3List=list()
nameList=[e["Name"] for e in stuList]
print(nameList)
sub1List=[e["Mark"][0]["Score"] for e in stuList]
sub2List=[e["Mark"][1]["Score"] for e in stuList]
sub3List=[e["Mark"][2]["Score"] for e in stuList]
print(sub1List,sub2List,sub3List)
plt.rcParams['font.sans-serif'] = ['SimHei']
plt.rcParams['axes.unicode_minus'] = False
bar_width=0.3
index0=np.arange(len(sub1List))
index1=index0+bar_width
index2=index1+bar_width
plt.bar(index0,height=sub1List,width=bar_width,color='b',label="English")
plt.bar(index1,height=sub2List,width=bar_width,color='g',label="Music")
plt.bar(index2,height=sub3List,width=bar_width,color='r',label="Chinese")
plt.legend()  # 显示图例
plt.xticks(index0 + bar_width/2, nameList)  # 让横坐标轴刻度显示 nameList 里的饮用水， index_male + bar_width/2 为横坐标轴刻度的位置
plt.ylabel('成绩')  # 纵坐标轴标题
plt.title('成绩柱状图')
plt.show()

 

 

 

基础训练:

m1.py

import numpy as np
import matplotlib.pyplot as plt

#1
# x=[3,4,5,6,7]
# y=[30,45,50,60,70]
# plt.bar(x,y)
# plt.plot(x,y,c=u'y')
# plt.scatter(x,y,c=u'r',marker=u'+')
# plt.show()

# #2
# x=np.array([3,4,5,6,7])
# y=2*x+10
# plt.bar(x,y)
# plt.plot(x,y,c=u'y')
# plt.scatter(x,y,c=u'r',marker=u'+')
# plt.show()

#3
# x=np.array([0,3,4,5,6])
# y=2*x**2+10*x+3
# plt.bar(x,y)
# plt.plot(x,y,c=u'y')
# plt.scatter(x,y,c=u'r',marker=u'+')
# plt.show()

#4
# x=np.arange(0,100,0.5)
# y=2*x**2+10*x+3
# plt.bar(x,y)
# plt.plot(x,y,c=u'y')
# plt.scatter(x,y,c=u'r',marker=u'+')
# plt.show()

#5
x=np.linspace(0,100,200)
y=2*x**2+10*x+3
plt.bar(x,y)
plt.plot(x,y,c=u'y')
plt.scatter(x,y,c=u'r',marker=u'+')
plt.show()

m2.py

import numpy as np
import matplotlib.pyplot as plt


plt.figure(1)
ax1=plt.subplot(3,2,1)
ax2=plt.subplot(3,2,2)
ax3=plt.subplot(3,2,3)
ax4=plt.subplot(3,2,4)
ax5=plt.subplot(3,2,5)

#1
x=[3,4,5,6,7]
y=[30,45,50,60,70]
plt.sca(ax1)
plt.plot(x,y,c=u'y')
plt.scatter(x,y,c=u'r',marker=u'+')

# #2
x2=np.array([3,4,5,6,7])
y2=2*x2+10
plt.sca(ax2)
plt.bar(x2,y2)
plt.plot(x2,y2,c=u'y')
plt.scatter(x2,y2,c=u'r',marker=u'+')


#3
x3=np.array([0,3,4,5,6])
y3=2*x3**2+10*x3+3
plt.sca(ax3)
plt.bar(x3,y3)
plt.plot(x3,y3,c=u'y')
plt.scatter(x3,y3,c=u'r',marker=u'+')


#4
x4=np.arange(0,100,0.5)
y4=2*x4**2+10*x4+3
plt.sca(ax4)
plt.bar(x4,y4)
plt.plot(x4,y4,c=u'y')
plt.scatter(x4,y4,c=u'r',marker=u'+')


#5
x5=np.linspace(0,100,200)
y5=2*x5**2+10*x5+3
plt.sca(ax5)
plt.bar(x5,y5)
plt.plot(x5,y5,c=u'y')
plt.scatter(x5,y5,c=u'r',marker=u'+')

plt.show()

 源码下载 >>

 

 

----------------

算法代码解析:

def GetList(iMax):
    intList=[]
    for i in range(1,iMax+1):
        if(i%7==0):
            intList.append(i)
    return intList

 

posted on 2022-03-25 14:12  e媒网络技术团队  阅读(123)  评论(0)    收藏  举报