How do I make my function to process the str first?-CodePudding

I have this function:

def damage_rate(hurricanes):
    damage_scale = {0: 0,
                    1: 100000000,
                    2: 1000000000,
                    3: 10000000000,
                    4: 50000000000}
    hurricanes_by_damage = {0:[], 1:[], 2:[], 3:[], 4:[], 5:[]}
    for cane in hurricanes:
        total_damage = hurricanes[cane]['Damage']
        if total_damage == "Damages not recorded":
            hurricanes_by_damage[0].append(hurricanes[cane])
        elif total_damage == damage_scale[0]:
            hurricanes_by_damage[0].append(hurricanes[cane])
        elif total_damage > damage_scale[0] and total_damage <= damage_scale[1]:
            hurricanes_by_damage[1].append(hurricanes[cane])
        elif total_damage > damage_scale[1] and total_damage <= damage_scale[2]:
            hurricanes_by_damage[2].append(hurricanes[cane])
        elif total_damage > damage_scale[2] and total_damage <= damage_scale[3]:
            hurricanes_by_damage[3].append(hurricanes[cane])
        elif total_damage > damage_scale[3] and total_damage <= damage_scale[4]:
            hurricanes_by_damage[4].append(hurricanes[cane])
        elif total_damage > damage_scale[4]:
            hurricanes_by_damage[5].append(hurricanes[cane])
    return hurricanes_by_damage

But when I try to print it in Jupyter, it keeps telling me that '>' is not supported between str and int.

I already tried a different method of ignoring the str in the library with pass but it didn't work either.

CodePudding user response：

Convert the value to int before comparing and it should resolve the issue. Keep in mind the edge cases where the value is not a numeric value other than "Damaged not recorded" would throw another error that needs to be handled.

In your case, the simple fix would be:

def damage_rate(hurricanes):
damage_scale = {0: 0,
                1: 100000000,
                2: 1000000000,
                3: 10000000000,
                4: 50000000000}
hurricanes_by_damage = {0:[], 1:[], 2:[], 3:[], 4:[], 5:[]}
for cane in hurricanes:
    total_damage = hurricanes[cane]['Damage']
    if total_damage == "Damages not recorded":
        hurricanes_by_damage[0].append(hurricanes[cane])
    
    else:
        try:
            total_damage = int(total_damage) #converting to integer to compare
        except Exception as E:
            print(E)
            print(f"Cant convert '{total_damage}' to int") #add code to handle error here

        if total_damage == damage_scale[0]:
            hurricanes_by_damage[0].append(hurricanes[cane])
        elif total_damage > damage_scale[0] and total_damage <= damage_scale[1]:
            hurricanes_by_damage[1].append(hurricanes[cane])
        elif total_damage > damage_scale[1] and total_damage <= damage_scale[2]:
            hurricanes_by_damage[2].append(hurricanes[cane])
        elif total_damage > damage_scale[2] and total_damage <= damage_scale[3]:
            hurricanes_by_damage[3].append(hurricanes[cane])
        elif total_damage > damage_scale[3] and total_damage <= damage_scale[4]:
            hurricanes_by_damage[4].append(hurricanes[cane])
        elif total_damage > damage_scale[4]:
            hurricanes_by_damage[5].append(hurricanes[cane])
return hurricanes_by_damage

CodePudding user response：

The issue is that the values in the damage_scale dictionary and the total_damage variable are of different data types. damage_scale has integer values, while total_damage is a string. This causes the comparison operations (>, <=, etc.) to fail with a "not supported between instances of 'str' and 'int'" error.

You need to make sure that total_damage is of the same data type as the values in the damage_scale dictionary. You can do this by converting total_damage to an integer before doing the comparison operations. For example:


def damage_rate(hurricanes):
    damage_scale = {0: 0,
                    1: 100000000,
                    2: 1000000000,
                    3: 10000000000,
                    4: 50000000000}
    hurricanes_by_damage = {0:[], 1:[], 2:[], 3:[], 4:[], 5:[]}
    for cane in hurricanes:
        total_damage = hurricanes[cane]['Damage']
        if total_damage == "Damages not recorded":
            hurricanes_by_damage[0].append(hurricanes[cane])
        else:
            total_damage = int(total_damage)
            if total_damage <= damage_scale[0]:
                hurricanes_by_damage[0].append(hurricanes[cane])
            elif total_damage <= damage_scale[1]:
                hurricanes_by_damage[1].append(hurricanes[cane])
            elif total_damage <= damage_scale[2]:
                hurricanes_by_damage[2].append(hurricanes[cane])
            elif total_damage <= damage_scale[3]:
                hurricanes_by_damage[3].append(hurricanes[cane])
            elif total_damage <= damage_scale[4]:
                hurricanes_by_damage[4].append(hurricanes[cane])
            else:
                hurricanes_by_damage[5].append(hurricanes[cane])
    return hurricanes_by_damage

This code first checks if total_damage is "Damages not recorded". If it is, it appends the hurricane to the hurricanes_by_damage[0] list. If it's not, it converts total_damage to an integer and does the comparison operations using integer values.