Question

我有一张字典如图所示，我想知道如何编写内容来检查每个键的每个值，并检查它们是否满足特定条件，如8以上的值等。

http://i.imgur.com/qtfkK61.png

值为float，每个字典值的区域有多个值。

def main(): #defining main function
    magList = [] #magnitude list of all together
    regionList = [] #creating list to hold region names
    wholeList = []
    combinedList = []

    with open("earthquakes.txt", "r") as eqList: #opens earthquake text file and gets the magnitudes
        eqList.readline()
        for line in eqList:
            line = line.split()
            magList.append(float(line[1])) #appends magnitude as float values in list

    with open("earthquakes.txt", "r") as eqList2: #open file 2nd time for gathering the region name only 
            eqList2.readline()
            for line in eqList2:
                line = line.split()
                line = line[0:7] + [" ".join(line[7:])] #takes whole line info and adds to list
                wholeList.append(line)

    greatMag = [] #creating lists for different category magnitudes
    majorMag = []
    strongMag = []
    moderateMag = []

    for x in magList: #conditions for seperating magnitude
        if x >= 8:
            greatMag.append(x)
        elif  7 <= x <= 7.9:
            majorMag.append(x)
        elif 6 <= x <= 6.9:
            strongMag.append(x)
        elif 5 <= x <= 5.9:
            moderateMag.append(x)

    for line in wholeList: #takes only magnitude and region name from whole list
        combinedList.append([line[7], line[1]])

    infoDict = {} #creates dictionary    
    for key, val in combinedList: #makes one key per region and adds all values corresponding to the region
        infoDict.setdefault(key, []).append(val)
    print(infoDict)

    for k, v in infoDict.items():
        for i in v:
            if i >= 8:
                print("Great Magnitude:", i)
                pass

if __name__ == "__main__": #runs main function
    main()

Answer 1

for k,v in d.items(): # iterate through key, value of dict 'd'
  for i in v: # iterate to dict value which is a list
    if i > 8: # your condition
      # do something here
      pass

检查字典中的浮点值以了解Python中的条件

1 个答案: