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我在 python 中从 for 循环中打印出许多行，如下所示：

class Wordnet():

    def compose_line6(self, pointers, pointers_synset_type):    
        for A, B in zip(pointers, pointers_synset_type):
            self.line6 += 'http://www.example.org/lexicon#'+A+' http://www.monnetproject.eu/lemon#pos '+B+'\n'
        return self.line6

    def compose_line7(self, pointers, pointer_source_target):
        for A, B in zip(pointers, pointer_source_target):
            self.line7 += 'http://www.example.org/lexicon#'+A+' http://www.monnetproject.eu/lemon#source_target '+B+'\n'
        return self.line7

'\n' 的存在是为了让 for 循环不只是在一个大块中打印出来，但这也会在每个循环的末尾添加一个空行。目前使用这种方法打印这些：

def compose_contents(self, line1, line2, line3, line4, line5, line6, line7):
    self.contents = '\n'.join([line1, line2, line3, line4, line5, line6, line7])
    return self.contents

打印self.contents给出了这个：

http://www.example.org/lexicon#13796604 http://www.monnetproject.eu/lemon#pos n
http://www.example.org/lexicon#00603894 http://www.monnetproject.eu/lemon#pos a
http://www.example.org/lexicon#00753137 http://www.monnetproject.eu/lemon#pos v
http://www.example.org/lexicon#01527311 http://www.monnetproject.eu/lemon#pos v
http://www.example.org/lexicon#02361703 http://www.monnetproject.eu/lemon#pos v

http://www.example.org/lexicon#13796604 http://www.monnetproject.eu/lemon#source_target 0000
http://www.example.org/lexicon#00603894 http://www.monnetproject.eu/lemon#source_target 0401
http://www.example.org/lexicon#00753137 http://www.monnetproject.eu/lemon#source_target 0302
http://www.example.org/lexicon#01527311 http://www.monnetproject.eu/lemon#source_target 0203
http://www.example.org/lexicon#02361703 http://www.monnetproject.eu/lemon#source_target 0101

如何避免 print() 中间出现空行？

编辑：所有这些方法都在 for 循环中调用 def line_for_loop(self, file): for line in file: self.compose_line6(self.pointers, self.pointers_synset_type) self.compose_line7(self.pointers, self.pointer_source_target) self .compose_contents（self.line1，self.line2，self.line3，self.line4，self.line5，self.line6，self.line7）

印刷品是print wordnet.contents

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1 回答 1

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过滤掉空行：

def compose_contents(self, *lines):
    self.contents = '\n'.join([line for line in lines if line.strip()])
    return self.contents

*args这通过使用任意位置参数语法支持任意数量的输入行。

于 2013-06-28T11:07:17.217 回答