将列表显示为某个十进制数-Python 3.x

Question

I'm having trouble displaying my list in a money format ($0000.00)

priceList = [1,2,3,4,5,6,7,8,9,10]
    for i in range (10):
    priceList[i] = random.uniform(1,1000)
print (priceList)

If I try

print ('%.02d' %(priceList))

Python returns

TypeError: %d format: a number is required, not list

Answer 1

You cannot print a list this way, you need to print each list item. A list comprehension works well here:

[print('%.02f' % i) for i in priceList]

Answer 2

Because you are trying to do that operation over a list. You need to do it on each element in your list. Try this:

Also, I think you want to use %.02f and not %.02d

print(' '.join('%.02f' % (x) for x in priceList))

Output:

728.08 289.73 117.96 29.70 562.40 255.97 213.55 235.08 436.10 654.54

If you want it just as a list, you can simply do this only:

print(['%.02f' % x for x in priceList])

Answer 3

You should be using proper Python 3 format strings. You can do something like this:

import random
priceList = [1,2,3,4,5,6,7,8,9,10]
for i in range (10):
    priceList[i] = random.uniform(1,1000)

moneyList = list(map(lambda x: "${:07.02f}".format(x), priceList))
print(moneyList)  # => output:
"""
['$294.90', '$121.71', '$590.29', '$45.52', '$319.40', '$189.03', '$594.63', '$135.24', '$645.56', '$954.57']
"""

Answer 4

You need to put the printing inside your for loop:

priceList = [1,2,3,4,5,6,7,8,9,10]
for i in range(10):
    priceList[i] = random.uniform(1,1000)
    print("${:07.02f}".format(priceList[i]))

In 07.02f , 07 says to make sure that the string is at least 7 characters long. The 0 is there because if the string is less than 7 characters, that is the character to be used to make it 7 characters. 02 before the f means that there should be at least two characters after the decimal point. The 0 is there so that if there are fewer than two characters, it will be used to fill it in.