Python第五次作业-朱名铨
作者:互联网
习题1:读入文件pmi_days.csv,完成以下操作:
1.统计质量等级对应的天数,例如:
优:5天
良:3天
中度污染:2天
2.找出PMI2.5的最大值和最小值,分别指出是哪一天。
import csv a=0 b=0 c=0 d=0 lista=[] listb=[] with open("C:/Users/Administrator/pmi_days.csv",'r') as f: reader = csv.reader(f) fieldnames = next(reader) csv_reader = csv.DictReader(f,fieldnames=fieldnames) for row in csv_reader: dict={} for key,value in row.items(): dict[key]=value if value =="中度污染": a=a+1 if value =="轻度污染": b=b+1 if value =="良": c=c+1 if value =="优": d=d+1 if key == 'PM2.5': e = dict.get('PM2.5') lista.append(e) lista =list(map(int,lista)) if key == "日期": f = dict.get('日期') listb.append(f) for i in range(0,len(lista)): if lista[i] == max(lista): date = listb[i] if lista[i] == min(lista): mindate = listb[i] print("中度污染出现次数为:",a) print("轻度污染出现次数为:",b) print("良出现次数为:",c) print("优出现次数为:",d) print("PM2.5最大为:",max(lista)) print("PM2.5最大那天为",date) print("PM2.5最小为:",min(lista)) print("PM2.5最小那天为",mindate)
习题2:读入文件1980-2018GDP.csv,完成以下操作:
1.按行输出每年GDP数据,表头列名如文件第1行所示。
2.将各年GDP数据转换成字典格式,以年份为keys,其它值为values(数据类型为列表方式),例如:
{
2017:[827121.7,6.8%,60989]
........
}
3.遍历字典数据,求出GDP的最小值与最大值,并输出数据与对应的年份。
import csv lista=[] listb=[] bijiao=[] x={} with open("C:/Users/Administrator/1980-2018GDP.csv", 'r') as f: reader = csv.reader(f) fieldnames = next(reader) print(fieldnames) for row in reader: lista.append(row) for i in range(0,len(lista)): print("%-8s"%lista[i][0],"\t%-10.7s"%lista[i][1],"\t%-12.5s"%lista[i][2],"\t%-13.5s"%lista[i][3],lista[i][4]) with open("1980-2018GDP.csv", 'r') as f: reader = csv.reader(f) fieldnames = next(reader) csv_reader = csv.DictReader(f, fieldnames=fieldnames) for w in csv_reader: dict = {} for key, value in w.items(): dict[key] = value if key=='GDP(亿元)': bijiao.append(float(dict.get('GDP(亿元)'))) dict.get('年份') listb.append(int(dict.get('年份'))) for i in range(0,len(lista)): x[listb[i]]=lista[i][1:] if lista[i] == max(lista): maxyear = listb[i] if lista[i] == min(lista): minyear = listb[i] print(x) print("GDP最大值为:{}亿元 那一年是:{}年".format(max(bijiao),maxyear)) print("GDP最小值为:{}亿元 那一年是:{}年".format(min(bijiao),minyear))
标签:Python,朱名铨,第五次,dict,reader,print,csv,lista,listb 来源: https://www.cnblogs.com/luckyvip520/p/10920319.html