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我正在使用pyparsing在「CREATE TABLE」之後添加分號(「;」)。如果我有這樣的輸入:正確的評論掃描pyparsing
CREATE TABLE A (B VARCHAR(255))
該計劃將給予下一輸出:
CREATE TABLE A (B VARCHAR(255))
--Comment
當程序是:當有評論左右,這樣
CREATE TABLE A (B VARCHAR(255));
故障出現給予:
CREATE TABLE A (B VARCHAR(255))
--Comment
;
這裏是代碼:
import pyparsing as par
alphanumsword = par.Word(par.alphanums + "_")
element = "(" + alphanumsword + ")" | alphanumsword
row = par.OneOrMore(element)
rows = row + par.OneOrMore("," + row) | row
semicolon = par.Literal(";")
comment1 = par.Literal("--") + par.restOfLine + par.LineEnd()
createtable = par.CaselessLiteral("create") + par.CaselessLiteral("table")
+ alphanumsword + "(" + rows + ")" + ~semicolon
createtable.ignore(comment1)
createtable.ignore(par.cStyleComment)
text = \
"""
CREATE TABLE PERSON
(
/* Comment */
/*
Comment
*/
ID VARCHAR(255),
NAME VARCHAR(255), -- Comment
--- Comment
ADDRESS VARCHAR(255) NULL, -- Comment
CONSTRAINT PK_PERSON PRIMARY KEY (ID)
)
-- Comment
CREATE TABLE A (B VARCHAR(255))
"""
text_list = list(text)
offset = 0
for t,s,e in createtable.scanString(text):
print "(", t, ",", s, ",", e, ")"
print "||", text[s:e], "||"
text_list.insert(e + offset, ';')
offset += 1
print "".join(text_list)