[英]I want to get rid of all the special characters like [(' and im really stuck in how to
def trackItems():
cursor.execute("SELECT ItemsBought, COUNT(*) FROM Purchase GROUP BY ItemsBought")
stock = []
Graphs = cursor.fetchall()
print(Graphs)
separator = " "
f = open("Stock.txt", "w")
values = ','.join([str(i) for i in Graphs])
f.write(values)
Output
('不要', 1),('我的', 2),('请', 2)
我怎样才能摆脱左括号和右括号以及所有引号。 如果有人可以提供帮助,将不胜感激
您可以使用 str.replace(substring, "") 将字符串中的子字符串替换为 "" (因此它将删除它),例如
"(abcd(.ad".replace("(", "") #output: abcd.ad
然后你可以把这个字符串写到文件中。 代码:
def trackItems():
cursor.execute("SELECT ItemsBought, COUNT(*) FROM Purchase GROUP BY ItemsBought")
stock = []
Graphs = cursor.fetchall()
print(Graphs)
separator = " "
f = open("Stock.txt", "w")
values = ','.join([str(i) for i in Graphs]).replace("(", "").replace(")", "").replace("'", "")
f.write(values)
与其将其视为特殊字符的问题,不如将其视为将子序列(元组、行)的序列(列表)扁平化为单个元素的列表,然后可以将其joined
起来。
您可以使用for
循环执行此操作:
>>> flattened = []
>>> for row in Graphs:
... flattened.extend(row)
...
>>> flattened
['DONT', 1, 'MY', 2, 'PLEASE', 2]
但列表理解更惯用
>>> Graphs = [('DONT', 1),('MY', 2),('PLEASE', 2)]
>>> values = ','.join([str(i) for j in Graphs for i in j])
>>> print(values)
DONT,1,MY,2,PLEASE,2
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