如何解决Python 3中多行字符串赋值代码的报错问题

错误原因 #

你的代码报错是因为普通双引号字符串（"..."）无法直接跨行书写，当前代码里的字符串在换行处没有正确处理，导致Python解析器认为字符串未终止，进而引发后续的语句分隔错误。

修复方案 #

以下三种方法任选其一即可：

方法1：用反斜杠转义换行 #

在每一行的末尾添加\（注意\后面不能有任何空格或字符，直接接换行）：

line = "48,[['c0', 700, 2401], ['c1', 300, 2002], ['c2', 100, 1803], ['c3', 900, \
2604], ['c4', 200, 1905], ['c5', 700, 2406], ['c8', 1200, 2909], ['c11', \
600, 2312], ['c14', 400, 2115], ['c28', 500, 2229], ['c29', 300, 2030], \
['c31', 1200, 2932], ['c35', 1600, 3336], ['c36', 1700, 3437], ['c39', \
300, 2040], ['c13', 800, 3215], ['c17', 1600, 5230], ['c15', 1600, 5229], \
['c19', 1100, 4335], ['c10', 1500, 3513], ['c22', 900, 4535], ['c9', 1800, \
3715], ['c18', 900, 4532], ['c7', 1000, 3612], ['c12', 500, 3117], ['c16', \
700, 4329], ['c6', 500, 2913], ['c20', 1400, 4334], ['c30', 1200, 5763], \
['c25', 1500, 5860], ['c27', 700, 5958], ['c26', 900, 6157], ['c24', 1800, \
7054], ['c23', 500, 5753], ['c21', 1200, 3534], ['c37', 300, 7392], \
['c33', 500, 6287], ['c40', 1100, 7099], ['c34', 1000, 6993], ['c41', \
1900, 8099], ['c32', 100, 5896], ['c38', 700, 6599], ['c45', 800, 7839], \
['c43', 1300, 7943], ['c42', 300, 8442], ['c47', 1800, 9240], ['c44', 400, \
7837], ['c46', 300, 7739]]"

方法2：改用三重引号字符串 #

三重引号（"""..."或'''...'''）支持直接跨行书写，无需转义：

line = """48,[['c0', 700, 2401], ['c1', 300, 2002], ['c2', 100, 1803], ['c3', 900, 
2604], ['c4', 200, 1905], ['c5', 700, 2406], ['c8', 1200, 2909], ['c11', 
600, 2312], ['c14', 400, 2115], ['c28', 500, 2229], ['c29', 300, 2030], 
['c31', 1200, 2932], ['c35', 1600, 3336], ['c36', 1700, 3437], ['c39', 
300, 2040], ['c13', 800, 3215], ['c17', 1600, 5230], ['c15', 1600, 5229], 
['c19', 1100, 4335], ['c10', 1500, 3513], ['c22', 900, 4535], ['c9', 1800, 
3715], ['c18', 900, 4532], ['c7', 1000, 3612], ['c12', 500, 3117], ['c16', 
700, 4329], ['c6', 500, 2913], ['c20', 1400, 4334], ['c30', 1200, 5763], 
['c25', 1500, 5860], ['c27', 700, 5958], ['c26', 900, 6157], ['c24', 1800, 
7054], ['c23', 500, 5753], ['c21', 1200, 3534], ['c37', 300, 7392], 
['c33', 500, 6287], ['c40', 1100, 7099], ['c34', 1000, 6993], ['c41', 
1900, 8099], ['c32', 100, 5896], ['c38', 700, 6599], ['c45', 800, 7839], 
['c43', 1300, 7943], ['c42', 300, 8442], ['c47', 1800, 9240], ['c44', 400, 
7837], ['c46', 300, 7739]]"""

方法3：字符串拼接 #

把每行字符串拆分后用+连接，换行处同样可以用\转义：

line = "48,[['c0', 700, 2401], ['c1', 300, 2002], ['c2', 100, 1803], ['c3', 900, " + \
"2604], ['c4', 200, 1905], ['c5', 700, 2406], ['c8', 1200, 2909], ['c11', " + \
"600, 2312], ['c14', 400, 2115], ['c28', 500, 2229], ['c29', 300, 2030], " + \
"['c31', 1200, 2932], ['c35', 1600, 3336], ['c36', 1700, 3437], ['c39', " + \
"300, 2040], ['c13', 800, 3215], ['c17', 1600, 5230], ['c15', 1600, 5229], " + \
"['c19', 1100, 4335], ['c10', 1500, 3513], ['c22', 900, 4535], ['c9', 1800, " + \
"3715], ['c18', 900, 4532], ['c7', 1000, 3612], ['c12', 500, 3117], ['c16', " + \
"700, 4329], ['c6', 500, 2913], ['c20', 1400, 4334], ['c30', 1200, 5763], " + \
"['c25', 1500, 5860], ['c27', 700, 5958], ['c26', 900, 6157], ['c24', 1800, " + \
"7054], ['c23', 500, 5753], ['c21', 1200, 3534], ['c37', 300, 7392], " + \
"['c33', 500, 6287], ['c40', 1100, 7099], ['c34', 1000, 6993], ['c41', " + \
"1900, 8099], ['c32', 100, 5896], ['c38', 700, 6599], ['c45', 800, 7839], " + \
"['c43', 1300, 7943], ['c42', 300, 8442], ['c47', 1800, 9240], ['c44', 400, " + \
"7837], ['c46', 300, 7739]]"

内容的提问来源于stack exchange，提问作者bw13300