Python练习题答案: 转换货币II【难度：2级】--景越Python编程实例训练营,1000道上机题等你来挑战_武汉理工大学头歌货币转换答案

转换货币II【难度:2级】:

答案1:

def solution(to,lst):
    dolSym, eurSym, power = ('', '€', -1) if to=='EUR' else ('$','', 1)
    return [f"{ dolSym }{ v*1.1363636**power :,.2f}{ eurSym }" for v in lst]​

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答案2:

def solution(to_cur, values):
    rate  = 1.1363636
    style = "{:,.2f}"
    
    if to_cur == "EUR":
        rate = 1 / rate
        style += "€"
    else:      # "USD"
        style = "$" + style
    
    return [style.format(v * rate) for v in values]​

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答案3:

def solution(to_cur,value):
    #multiply number by appropriate conversion rate, and round using the ",.2f" format (rounds/pads to last 2 decimals and uses commas)
    return [f"${i*1.1363636:,.2f}" if to_cur == "USD" else f"{i/1.1363636:,.2f}€" for i in value]​

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答案4:

def solution(to_cur,value):
    r = []
    for number in value:
        if to_cur == "USD":
            r.append("${:,.2F}".format(number * 1.1363636))
        else:
            r.append("{:,.2F}€".format(number / 1.1363636))
    return r​

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答案5:

def solution(to_cur,value):
    if to_cur is 'USD':
        return [f'${i*1.1363636:,.2f}' for i in value]
    if to_cur is 'EUR':
        return [f'{i/1.1363636:,.2f}€' for i in value]​

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答案6:

conv = {
    'EUR': lambda v: '{:,.2f}€'.format(round(v/1.1363636,2)),
    'USD': lambda v: '${:,.2f}'.format(round(v*1.1363636,2))
}

solution = lambda cur,val: [conv[cur](v) for v in val]
​

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答案7:

def solution(to_cur,values):
    if to_cur == 'EUR':
        return [f'{val / 1.1363636:,.2f}€' for val in values]
    return [f'${val * 1.1363636:,.2f}' for val in values]​

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答案8:

def solution(to_cur,value):
    rate = 1.1363636
    USD = "${:,.2f}".format
    EUR = "{:,.2f}€".format
    return [USD(cur * rate) if to_cur == "USD" else EUR(cur / rate) for cur in value]​

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答案9:

def solution(to_cur,value):
    d ={"USD": lambda x: "${:,.2f}".format(x*1.1363636),"EUR": lambda x: "{:,.2f}€".format(x/1.1363636)}
    return list(map(d[to_cur], value))​

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答案10:

def solution(to_cur,value):
    USD_TO_EUR_RATE = 1.1363636
    if to_cur == 'USD':
        return ['${:,.2f}'.format(round(x * USD_TO_EUR_RATE, 2)) for x in value]
    elif to_cur == 'EUR':
        return ['{:,.2f}€'.format(round(x / USD_TO_EUR_RATE, 2)) for x in value]
    else:
        raise valueError​

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