Question

如何从列中的列表中打印Python值？

我对它们进行了排序，但我不知道如何以两种方式打印它们例如：

list=['apricot','banana','apple','car','coconut','baloon','bubble']

第一个：

apricot      bubble     ...
apple        car        
baloon       coconut

第二种方式：

apricot    apple     baloon   
bubble     car      coconut

我也希望将所有内容与ljust / rjust对齐。

我试过这样的事情：

print " ".join(word.ljust(8) for word in list)

但它只显示在第一个例子中。我不知道这是否是正确的方法。

Answer 1

the_list = ['apricot','banana','apple','car','coconut','baloon','bubble']
num_columns = 3

for count, item in enumerate(sorted(the_list), 1):
    print item.ljust(10),
    if count % num_columns == 0:
        print

输出：

apple      apricot    baloon    
banana     bubble     car       
coconut

<强>更新：这是一个全面的解决方案，可以解决您给出的两个示例。我已经为此创建了一个函数，我已经对代码进行了评论，以便明白它是什么。

def print_sorted_list(data, rows=0, columns=0, ljust=10):
    """
    Prints sorted item of the list data structure formated using
    the rows and columns parameters
    """

    if not data:
        return

    if rows:
        # column-wise sorting
        # we must know the number of rows to print on each column
        # before we print the next column. But since we cannot
        # move the cursor backwards (unless using ncurses library)
        # we have to know what each row with look like upfront
        # so we are basically printing the rows line by line instead
        # of printing column by column
        lines = {}
        for count, item in enumerate(sorted(data)):
            lines.setdefault(count % rows, []).append(item)
        for key, value in sorted(lines.items()):
            for item in value:
                print item.ljust(ljust),
            print
    elif columns:
        # row-wise sorting
        # we just need to know how many columns should a row have
        # before we print the next row on the next line.
        for count, item in enumerate(sorted(data), 1):
            print item.ljust(ljust),
            if count % columns == 0:
                print
    else:
        print sorted(data)  # the default print behaviour


if __name__ == '__main__':
    the_list = ['apricot','banana','apple','car','coconut','baloon','bubble']
    print_sorted_list(the_list)
    print_sorted_list(the_list, rows=3)
    print_sorted_list(the_list, columns=3)

列中的Python打印列表

1 个答案: