我有3个清单：
minimal_values = ['0,32', '0,35', '0,45']
maximal_values = ['0,78', '0,85', '0,72']
my_list = [
['Morocco', 'Meat', '190,00', '0,15'],
['Morocco', 'Meat', '189,90', '0,32'],
['Morocco', 'Meat', '189,38', '0,44'],
['Morocco', 'Meat', '188,94', '0,60'],
['Morocco', 'Meat', '188,49', '0,78'],
['Morocco', 'Meat', '187,99', '0,101'],
['Spain', 'Meat', '190,76', '0,10'],
['Spain', 'Meat', '190,16', '0,20'],
['Spain', 'Meat', '189,56', '0,35'],
['Spain', 'Meat', '189,01', '0,40'],
['Spain', 'Meat', '188,13', '0,75'],
['Spain', 'Meat', '187,95', '0,85'],
['Italy', 'Meat', '190,20', '0,11'],
['Italy', 'Meat', '190,10', '0,31'],
['Italy', 'Meat', '189,32', '0,45'],
['Italy', 'Meat', '188,61', '0,67'],
['Italy', 'Meat', '188,01', '0,72'],
['Italy', 'Meat', '187,36', '0,80']]
我想过滤器my_list基础上index [-1]，并在价值观minimal_values和maximal_values。像这样：
index[-1]介于0,32和之间的行0,78index[-1]介于0,35和之间的行0,85index[-1]介于0,45和之间的行0,72我最终想要my_list看起来像这样：
my_list = [
['Morocco', 'Meat', '189,90', '0,32'],
['Morocco', 'Meat', '189,38', '0,44'],
['Morocco', 'Meat', '188,94', '0,60'],
['Morocco', 'Meat', '188,49', '0,78'],
['Spain', 'Meat', '189,56', '0,35'],
['Spain', 'Meat', '189,01', '0,40'],
['Spain', 'Meat', '188,13', '0,75'],
['Spain', 'Meat', '187,95', '0,85'],
['Italy', 'Meat', '189,32', '0,45'],
['Italy', 'Meat', '188,61', '0,67'],
['Italy', 'Meat', '188,01', '0,72']]
这是我尝试的代码：
for l in my_list:
if l[-1] >= [x for x in minimal_values] and <= [x for x in maximal_values]:
print(l)
我收到以下输出：
SyntaxError: invalid syntax
您可以选择这样的东西：
minimal_values = ['0,32', '0,35', '0,45']
maximal_values = ['0,78', '0,85', '0,72']
my_list = [
['Morocco', 'Meat', '190,00', '0,15'],
['Morocco', 'Meat', '189,90', '0,32'],
['Morocco', 'Meat', '189,38', '0,44'],
['Morocco', 'Meat', '188,94', '0,60'],
['Morocco', 'Meat', '188,49', '0,78'],
['Morocco', 'Meat', '187,99', '0,101'],
['Spain', 'Meat', '190,76', '0,10'],
['Spain', 'Meat', '190,16', '0,20'],
['Spain', 'Meat', '189,56', '0,35'],
['Spain', 'Meat', '189,01', '0,40'],
['Spain', 'Meat', '188,13', '0,75'],
['Spain', 'Meat', '187,95', '0,85'],
['Italy', 'Meat', '190,20', '0,11'],
['Italy', 'Meat', '190,10', '0,31'],
['Italy', 'Meat', '189,32', '0,45'],
['Italy', 'Meat', '188,61', '0,67'],
['Italy', 'Meat', '188,01', '0,72'],
['Italy', 'Meat', '187,36', '0,80']]
# Convert values to float.
minimal_values = [float(i.replace(',', '.')) for i in minimal_values]
maximal_values = [float(i.replace(',', '.')) for i in maximal_values]
# Collect all unique countries in a list.
countries = list(set(country[0] for country in my_list))
results = []
for l in my_list:
i = countries.index(l[0])
if minimal_values[i] <= float(l[-1].replace(',', '.')) <= maximal_values[i]:
results.append(l)
print(results)
输出：
[['Morocco', 'Meat', '189,90', '0,32'],
['Morocco', 'Meat', '189,38', '0,44'],
['Morocco', 'Meat', '188,94', '0,60'],
['Morocco', 'Meat', '188,49', '0,78'],
['Spain', 'Meat', '189,56', '0,35'],
['Spain', 'Meat', '189,01', '0,40'],
['Spain', 'Meat', '188,13', '0,75'],
['Spain', 'Meat', '187,95', '0,85'],
['Italy', 'Meat', '189,32', '0,45'],
['Italy', 'Meat', '188,61', '0,67'],
['Italy', 'Meat', '188,01', '0,72']]
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