如何在Python中从混合字符串中删除单个字符
我有一个表(请参考图片),在这个表中,我想从每一行中删除“A”字符,我在Python中该怎么做 下面是我使用如何在Python中从混合字符串中删除单个字符,python,optimization,replace,Python,Optimization,Replace,我有一个表(请参考图片),在这个表中,我想从每一行中删除“A”字符,我在Python中该怎么做 下面是我使用regexe\u replace的代码,但是代码没有优化,我想要优化的代码 def re(s): return regexp_replace(s, "A", "").cast("Integer") finalDF = finalD.select(re(col("C0")).alias("C0"),col("C1"),
regexe\u replace
的代码,但是代码没有优化,我想要优化的代码
def re(s):
return regexp_replace(s, "A", "").cast("Integer")
finalDF = finalD.select(re(col("C0")).alias("C0"),col("C1"),
re(col("C2")).alias("C2"),
re(col("C3")).alias("C3"),col("C4"),
re(col("C5")).alias("C5"),
re(col("C6")).alias("C6"),col("C7"),
re(col("C8")).alias("C8"),
re(col("C9")).alias("C9"),col("C10"),
re(col("C11")).alias("C11"),col("C12"),
re(col("C13")).alias("C13"),
re(col("C14")).alias("C14"),col("C15"),
re(col("C16")).alias("16"),col("C17"),
re(col("C18")).alias("18"),
re(col("C19")).alias("C19"),col("Label"))
finalDF.show(2)
提前谢谢。为什么要使用正则表达式?正则表达式将是致命的 如果您有给定格式的数据,则使用以下替换函数: master.csv的内容:
A11| 6|A34|A43|
A11| 6|A35|A44|
with open('master.csv','r') as fh:
for line in fh.readlines():
print "Before - ",line
line = line.replace('A','')
print "After - ", line
print "---------------------------"
C:\Users\dinesh_pundkar\Desktop>python c.py
Before remove...
A11| 6|A34|A43|
A11| 6|A35|A44|
After remove ...
11| 6|34|43|
11| 6|35|44|
C:\Users\dinesh_pundkar\Desktop>
代码:
A11| 6|A34|A43|
A11| 6|A35|A44|
with open('master.csv','r') as fh:
for line in fh.readlines():
print "Before - ",line
line = line.replace('A','')
print "After - ", line
print "---------------------------"
C:\Users\dinesh_pundkar\Desktop>python c.py
Before remove...
A11| 6|A34|A43|
A11| 6|A35|A44|
After remove ...
11| 6|34|43|
11| 6|35|44|
C:\Users\dinesh_pundkar\Desktop>
输出:
C:\Users\dinesh_pundkar\Desktop>python c.py
Before - A11| 6|A34|A43|
After - 11| 6|34|43|
---------------------------
Before - A11| 6|A35|A44|
After - 11| 6|35|44|
---------------------------
一次从完整数据中替换“A”的代码(不逐行进行)
输出:
A11| 6|A34|A43|
A11| 6|A35|A44|
with open('master.csv','r') as fh:
for line in fh.readlines():
print "Before - ",line
line = line.replace('A','')
print "After - ", line
print "---------------------------"
C:\Users\dinesh_pundkar\Desktop>python c.py
Before remove...
A11| 6|A34|A43|
A11| 6|A35|A44|
After remove ...
11| 6|34|43|
11| 6|35|44|
C:\Users\dinesh_pundkar\Desktop>
如果我是你,我不会定义
re
函数。它将与名称冲突。您能否提供更多的细节,例如,您的输入数据来自哪里?这是数据库里的吗?哪里定义了regexp\u replace
?理想情况下,你能给出一个我们能理解的完整程序吗?