这是我的代码(很抱歉格式化):
if row[0] == "":
empty1 = "true"
print "row[0] needs a Variable"
else:
print "row[0] has Variable"
if row[1] == "":
empty1 = "true"
print "row[1] needs a Variable"
else:
print "row[1] has Variable"
if row[2] == "":
empty1 = "true"
print "row[2] is Missing Variable"
else:
print "row[2] has Variable"
if row[3] == "":
empty2 = "true"
print "row[3] is Missing Variable"
else:
print "row[3] has Variable"
if row[4] == "":
empty3 = "true"
print "row[4] is Missing Variable"
else:
print "row[4] has Variable"
if row[5] == "":
empty4 = "true"
print "row[5] is Missing Variable"
else:
print "row[5] has Variable"
if row[6] == "":
empty5 = "true"
print "row[6] is Missing Variable"
else:
print "row[6] has Variable"
if row[7] == "":
empty6 = "true"
print "row[7] is Missing Variable"
else:
print "row[7] has Variable"
if row[8] == "":
empty7 = "true"
print "row[8] is Missing Variable"
else:
print "row[8] has Variable"
if row[9] == "":
empty8 = "true"
print "row[9] is Missing Variable"
else:
print "row[9] has Variable"
if row[10] == "":
empty9 = "true"
print "row[10] is Missing Variable"
else:
print "row[10] has Variable"
if row[11] == "":
empty10 = "true"
print "row[11] is Missing Variable"
else:
print "row[11] has Variable"
if row[12] == "":
empty10 = "true"
print "row[12] needs a Variable"
else:
print "row[12] has Variable"
myList = (row[0], row[1], row[2], row[3], row[12], row[12], row[0], row[12], row[12], row[12], row[0])
print(chunk % (myList))
我要做的是遍历.csv文件中的每一行,看看它是否有值。然后,如果它确实有一个值,我想将该行添加到底部的数组中,这样它将只打印填充的行。我该怎么做?任何帮助都将不胜感激。你知道吗
迭代数组中的每一行会更容易,如下所示:
让我们把代码分解一下,这样你就可以了解发生了什么。你知道吗
循环} 将为您提供列表的元素(在本例中,我们称之为
在for循环中,在引用处
#[1]
-^{val
),以及索引(在本例中,我们将其分配给变量i
)。你知道吗您也可以只执行
for val in row:
,但我在这里使用了enumerate
,所以您可以像在原始代码中那样打印每一行的索引。你知道吗if语句 引用
#[2]
处的if
语句只使用if val:
。这将检查变量val
是否具有非null
且不为空的值。编写if row[X] != ""
是一种更简洁的方法,虽然它们在逻辑上是相同的。你知道吗打印和字符串格式化 ref
#[3] and #[4]
中的print
语句允许打印,而不必硬编码行。%d
在字符串中用作数字的占位符,然后在字符串和%
运算符之后定义。在本例中,我们将变量i
放在那里(这是正在访问的row
的当前索引)。你知道吗继续我的
print
语句,我写的和有一样:print 'row[' + i + '] has a value'
只是稍微干净一点。你知道吗
还有一种新的建议方法,python^{} 。在这种情况下,您需要:
print 'row[{}] has a value"'.format(i)
希望这会有所帮助,如果我太过火了,我会很抱歉,我假设你是刚开始
Python
硬编码字符串的,而且有那么多if
的。如果有什么不清楚的地方,尽管问相关问题 更多 >
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