如何解决订购带两位数字的CSV
我正在尝试为游戏创建排行榜,在游戏玩完后,python脚本将访问CSV文件(未排序),并打印出得分最高的前5名。 Python似乎可以用一位数字来做到这一点,但是我无法让它与两位数字一起工作。这是代码:
import csv
import operator
sample = open('csv_sample2.txt','r')
csv1 = csv.reader(sample,delimiter=',')
sort = sorted(sample,key=operator.itemgetter(1))
for eachline in sort:
print(eachline)
,这是输出: (我现在仅使用占位符名称)
['Matt Damon',' 12']
['Robin Williams',' 14']
['Billy Crystal',' 15']
['Minnie Driver',' 17']
['Peter Sellers',' 6']
['Robert De Niro',' 8']
['Stanley Kubrick',' 9']
这是原始排行榜文件:
Matt Damon,12
Robert De Niro,8
Billy Crystal,15
Peter Sellers,6
Stanley Kubrick,9
Robin Williams,14
Minnie Driver,17
我如何才能正确订购数字?
解决方法
您的数据可能无法识别为数字?
data = [['Matt Damon',' 12'],['Robin Williams',' 14'],['Billy Crystal',' 15'],['Minnie Driver',' 17'],['Peter Sellers',' 6'],['Robert De Niro',' 8'],['Stanley Kubrick',' 9']]
# conversion to floats
data = [[item[0],float(item[1])] for item in data]
sorted(data,key=lambda x: x[1])
给我:
[['Peter Sellers',6.0],8.0],9.0],['Matt Damon',12.0],14.0],15.0],17.0]]
,
...: sample = [['Matt Damon',...: ['Robin Williams',...: ['Billy Crystal',...: ['Minnie Driver',...: ['Peter Sellers',...: ['Robert De Niro',...: ['Stanley Kubrick',' 9']]
...:
...: def get_int_item(o):
...: return int(o[1])
...:
...:
...: sort = sorted(sample,key=get_int_item)
...:
...: for eachline in sort:
...: print(eachline)
...:
['Peter Sellers',' 6']
['Robert De Niro',' 8']
['Stanley Kubrick',' 9']
['Matt Damon',' 12']
['Robin Williams',' 14']
['Billy Crystal',' 15']
['Minnie Driver',' 17']
,
我建议只使用file.readlines()读取文件,然后处理完成的结果。
输入文件:
Matt Damon,12
Robert De Niro,8
Billy Crystal,15
Peter Sellers,6
Stanley Kubrick,9
Robin Williams,14
Minnie Driver,17
代码:
data = []
with open('your_file.txt','r') as f:
scores = f.readlines()
# data is a list of tuples with a string name as the
# first value and a integer score as the second value
data = [ ( s.strip().split(',')[0],int(s.strip().split(',')[1]) ) for s in scores ]
sorted_data = sorted(data,key=lambda tup: tup[1],reverse=True)
for name,score in sorted_data:
print(f'{name} got a score of {score}')
# Prints:
# Minnie Driver got a score of 17
# Billy Crystal got a score of 15
# Robin Williams got a score of 14
# Matt Damon got a score of 12
# Stanley Kubrick got a score of 9
# Robert De Niro got a score of 8
# Peter Sellers got a score of 6
要仅打印出有序列表sorted_data
中的前五个分数,请在range()循环中使用for for x:
for x in range(5):
name,score = sorted_data[x]
print(f'{name} got a score of {score}')
此for循环将运行5次。它解压缩存储在sorted_data x
中的元组中包含的名称和分数,然后打印出该数据。
您数字中的答案是由字符串而不是整数识别的。 尝试使用int()转换得分,但要小心,不要输入operator.itemgetter对象。 int()函数仅接受字符串,类似字节的对象或数字。
sample = open('csv_sample2.txt','r')
csv1 = csv.reader(sample,delimiter=',')
sort = sorted(csv1,key=lambda k: int(k[1]))
如果您不希望出现空格,请使用str.strip()摆脱它们。
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