尝试对Python列表求和

Question

这是我在这里的第一篇文章，我正在学习和练习Python

问题是，我试图在for循环之后运行的任何东西都没有运行，因此在最后我无法获得总计数。也许我应该创建一个函数，但现在我需要知道为什么会发生这种情况，我做错了什么

lst = ["32.225.012", "US", "574.280", "17.997.267", "India", "201.187", "14.521.289", "Brazil", "398.185", "5.626.942", "France", "104.077", "4.751.026", "Turkey", "39.398", "4.732.981", "Russia", "107.547", "4.427.433", "United Kingdom", "127.734", "3.994.894", "Italy", "120.256", "3.504.799", "Spain", "77.943", "3.351.014", "Germany", "82.395", "2.905.172", "Argentina", "62.599", "2.824.626", "Colombia", "72.725", "2.776.927", "Poland", "66.533", "2.459.906", "Iran", "70.966", "2.333.126", "Mexico", "215.547", "2.102.130", "Ukraine", "45.211", "1.775.062", "Peru", "60.416", "1.657.035", "Indonesia", "45.116", "1.626.033", "Czechia", "29.141", "1.578.450", "South Africa", "54.285", "1.506.455", "Netherlands", "17.339", "1.210.077", "Canada", "24.105", "1.184.271", "Chile", "26.073", "1.051.868", "Iraq", "15.392", "1.051.779", "Romania", "27.833", "1.020.495", "Philippines", "17.031", "979.034", "Belgium", "24.104", "960.520", "Sweden", "14.000", "838.323", "Israel", "6.361", "835.563", "Portugal", "16.973", "810.231", "Pakistan", "17.530", "774.399", "Hungary", "27.172", "754.614", "Bangladesh", "11.305", "708.265", "Jordan", "8.754", "685.937", "Serbia", "6.312", "656.077", "Switzerland", "10.617", "614.510", "Austria", "10.152", "580.666", "Japan", "10.052", "524.241", "Lebanon", "7.224", "516.301", "United Arab Emirates", "1.580", "510.465", "Morocco", "9.015", "415.281", "Saudi Arabia", "6.935", "402.491", "Bulgaria", "16.278", "401.593", "Malaysia", "1.477", "381.180", "Slovakia", "11.611", "377.662", "Ecuador", "18.470", "366.709", "Kazakhstan", "3.326", "363.533", "Panama", "6.216", "355.924", "Belarus", "2.522", "340.493", "Greece", "10.242", "327.737", "Croatia", "7.001", "316.521", "Azerbaijan", "4.461", "312.699", "Nepal", "3.211","307.401", "Georgia", "4.077", "305.313", "Tunisia", "10.563", "300.258", "Bolivia", "12.885", "294.550", "West Bank and Gaza", "3.206", "271.814", "Paraguay", "6.094", "271.145", "Kuwait", "1.546", "265.819", "Dominican Republic", "3.467", "255.288", "Ethiopia", "3.639", "250.479", "Denmark", "2.482", "250.138", "Moldova", "5.780", "247.857", "Ireland", "4.896", "244.555", "Lithuania", "3.900", "243.167", "Costa Rica", "3.186", "238.421", "Slovenia", "4.236", "224.621", "Guatemala", "7.478", "224.517", "Egypt", "13.168", "214.872", "Armenia", "4.071", "208.356", "Honduras", "5.212", "204.289", "Qatar", "445","197.378", "Bosnia and Herzegovina", "8.464", "193.721", "Venezuela", "2.082", "192.326", "Oman", "2.001","190.096", "Uruguay", "2.452", "176.701", "Libya", "3.019","174.659", "Bahrain", "632","164.912", "Nigeria", "2.063", "158.326", "Kenya", "2.688","151.569", "North Macedonia", "4.772", "142.790", "Burma", "3.209","130.859", "Albania", "2.386", "121.580", "Algeria", "3.234", "121.232", "Estonia", "1.148", "120.673", "Korea. South", "1.821", "117.099", "Latvia", "2.118", "111.915", "Norway", "753","104.953", "Sri Lanka", "661", "104.512", "Cuba", "614","103.638", "Kosovo", "2.134", "102.426", "China", "4.845","97.080", "Montenegro", "1.485", "94.599", "Kyrgyzstan", "1.592", "92.513", "Ghana", "779","91.484", "Zambia", "1.249","90.008", "Uzbekistan", "646", "86.405", "Finland", "908","69.804", "Mozambique", "814", "68.922", "El Salvador", "2.117", "66.826", "Luxembourg", "792", "65.998", "Cameroon", "991","63.720", "Cyprus", "303","61.699", "Thailand", "178","61.086", "Singapore", "30","59.370", "Afghanistan", "2.611", "48.177", "Namibia", "638","46.600", "Botswana", "702","45.885", "Cote d'Ivoire", "285", "45.292", "Jamaica", "770","41.766", "Uganda", "341","40.249", "Senegal", "1.107", "38.191", "Zimbabwe", "1.565", "36.510", "Madagascar", "631", "34.052", "Malawi", "1.147","33.944", "Sudan", "2.349","33.608", "Mongolia", "97","30.249", "Malta", "413","29.768", "Congo Kinshasa", "763", "29.749", "Australia", "910", "29.052", "Maldives", "72","25.942", "Angola", "587","24.888", "Rwanda", "332","23.181", "Cabo Verde", "213", "22.568", "Gabon", "138","22.513", "Syria", "1.572","22.087", "Guinea", "141","18.452", "Eswatini", "671","18.314", "Mauritania", "455", "13.915", "Somalia", "713","13.780", "Mali", "477","13.308", "Tajikistan", "90", "13.286", "Burkina Faso", "157", "13.148", "Andorra", "125","13.017", "Haiti", "254","12.963", "Guyana", "293","12.898", "Togo", "122","12.631", "Belize", "322","11.761", "Cambodia", "88","10.986", "Djibouti", "142","10.915", "Papua New Guinea", "107", "10.730", "Lesotho", "316","10.678", "Congo Brazzaville", "144", "10.553", "South Sudan", "114", "10.220", "Bahamas", "198","10.170", "Trinidad and Tobago", "163", "10.157", "Suriname", "201","7.821", "Benin", "99","7.559", "Equatorial Guinea", "107", "6.898", "Nicaragua", "182","6.456", "Iceland", "29","6.359", "Central African Republic", "87", "6.220", "Yemen", "1.207","5.882", "Gambia", "174","5.354", "Seychelles", "26","5.220", "Niger", "191","5.059", "San Marino", "90","4.789", "Chad", "170","4.508", "Saint Lucia", "74", "4.049", "Sierra Leone", "79", "3.941", "Burundi", "6","3.833", "Comoros", "146","3.831", "Barbados", "44","3.731", "Guinea-Bissau", "67", "3.659", "Eritrea", "10","2.908", "Liechtenstein", "57", "2.865", "Vietnam", "35","2.610", "New Zealand", "26", "2.447", "Monaco", "32","2.301", "Sao Tome and Principe", "35", "2.124", "Timor-Leste", "3","2.099", "Liberia", "85","1.850", "Saint Vincent and the Grenadines", "11", "1.232", "Antigua and Barbuda", "32", "1.207", "Mauritius", "17","1.116", "Taiwan", "12","1.059", "Bhutan", "1","712", "Diamond Princess", "13", "604", "Laos", "0","509", "Tanzania", "21","224", "Brunei", "3","173", "Dominica", "0","159", "Grenada", "1","111", "Fiji", "2","44", "Saint Kitts and Nevis", "0", "27", "Holy See", "0","20", "Solomon Islands", "0", "9", "MS Zaandam", "2","4", "Marshall Islands", "0", "4", "Vanuatu", "1","3", "Samoa", "0","1", "Micronesia", "0"]

countryIndex = 1
 casesIndex = 0
 deathsIndex = 2

 countries = []
 cases = []
 deaths = []

for item in lst:
    print(f"Country: {lst[countryIndex]}")
    print(f"Cases: {lst[casesIndex]}")
    print(f"Deaths: {lst[deathsIndex]}")
    print("")

    countryToAppend = lst[countryIndex]
    casesToAppend = lst[casesIndex]
    deathsToAppend = lst[deathsIndex]

    countries.append(countryToAppend)
    cases.append(casesToAppend)
    deaths.append(deathsToAppend)

    countryIndex += 3
    casesIndex += 3
    deathsIndex += 3


total = sum(deaths)
print(f"Total deaths: {total}")

Answer 1

除了建议替换数据集的名称以不使用保留字列表之外，我的建议是在如下示例中利用内置range中的跳过功能：

# Lists to store data
countries = []
total_cases = []
total_deaths = []

# Iterate over thje range of the data skipping 3 at a time: 0, 3, ...
for x in range(0, len(data), 3):
    # Parse out the cases a deaths to ints
    cases = int(data[x].replace('.', ''))
    deaths = int(data[x+2].replace('.', ''))
    
    # We can just extract the country label
    country_label = data[x+1]
    
    countries.append(country_label)
    total_cases.append(cases)
    total_deaths.append(deaths)
    
# Get the desired sums
sum_cases = sum(total_cases)
sum_deaths = sum(total_deaths)

print(f"The total cases: {sum_cases}")
print(f"The total deaths: {sum_deaths}")

在上面，我将您的数据集重命名为data，并且能够对每个列表进行汇总

Answer 2

sum = 0 
for i in range(2,len(l),3): # l is your list of data , 
    sum = sum+int(l[i].replace('.','')) # here I removed the point between numbers ex: 574.280  > 574280
print(sum)

#output : 3145239