从字符串python中删除多余字符的问题

Question

I have a string given as:

text = """'select \\"ORDER_ID\\",\\r\\n    \\"LINE_ID\\",\\r\\n    \\"PRODUCT_ID\\",\\r\\n    \\"CUSTOMER_ID\\",\\r\\n    \\"PAYMENT_METHOD\\",\\r\\n    \\"STATUS\\",\\r\\n    \\"DATETIME_ORDER_PLACED\\",\\r\\n    \\"DATETIME_ORDER_SHIPPED\\",\\r\\n    \\"ORDER_QTY\\",\\r\\n    \\"ORDER_AMOUNT\\",\\r\\n    \\"ORDER_COST\\",\\r\\n    \\"ORDER_VAT\\",\\r\\n    \\"SHIPPING_COSR\\"\\r\\nfrom \\"DEMO\\".\\"DEMO\\".\\"ORDERS\\""

I am trying to clean this using below code:

text = text.replace("\\", '').replace('"', '')

I got the following result:

'select ORDER_ID,rn    LINE_ID,rn    PRODUCT_ID,rn    CUSTOMER_ID,rn    PAYMENT_METHOD,rn    STATUS,rn    DATETIME_ORDER_PLACED,rn    DATETIME_ORDER_SHIPPED,rn    ORDER_QTY,rn    ORDER_AMOUNT,rn    ORDER_COST,rn    ORDER_VAT,rn    SHIPPING_COSRrnfrom DEMO.DEMO.ORDERS

I cannot figure out why I am getting rn with every word. How I can get rid of this? I even tried using text = text.strip('\r\n') but it is not working.

Answer 1

Like this:

text = query_text = 'select \\"ORDER_ID\\",\\r\\n    \\"LINE_ID\\",\\r\\n    \\"PRODUCT_ID\\",\\r\\n    \\"CUSTOMER_ID\\",\\r\\n    \\"PAYMENT_METHOD\\",\\r\\n    \\"STATUS\\",\\r\\n    \\"DATETIME_ORDER_PLACED\\",\\r\\n    \\"DATETIME_ORDER_SHIPPED\\",\\r\\n    \\"ORDER_QTY\\",\\r\\n    \\"ORDER_AMOUNT\\",\\r\\n    \\"ORDER_COST\\",\\r\\n    \\"ORDER_VAT\\",\\r\\n    \\"SHIPPING_COSR\\"\\r\\nfrom \\"DEMO\\".\\"DEMO\\".\\"ORDERS\\"'
print(text.replace('\\"', '"').replace('\\r', "\r").replace("\\n", "\n"))

Output:

select "ORDER_ID",
    "LINE_ID",
    "PRODUCT_ID",
    "CUSTOMER_ID",
    "PAYMENT_METHOD",
    "STATUS",
    "DATETIME_ORDER_PLACED",
    "DATETIME_ORDER_SHIPPED",
    "ORDER_QTY",
    "ORDER_AMOUNT",
    "ORDER_COST",
    "ORDER_VAT",
    "SHIPPING_COSR"
from "DEMO"."DEMO"."ORDERS"

You get these kinds of strings for example when you call the repr function on a string:

print(repr('''new line:
'single quotes',"double quotes"'''))

Output:

'new line:\n\'single quotes\',"double quotes"'

Escaping is commonly used on the web.

Answer 2

You will have to replace \\r\\n first. You can do that by

text = text.replace("\\r\\n", '').replace("\\", '').replace('"', '')