我正在通过 Pygments
在 PyQt4
中创建一个简单的文本编辑器合成荧光笔。我有以下代码。
from PyQt4 import QtCore, QtGui
import time,sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from pygments import highlight
from pygments.lexers import PythonLexer,get_lexer_by_name
from pygments.formatters import HtmlFormatter
def highlighter():
text = area.toPlainText()
result = highlight(text, lexer, formatter)
area.setText(result)
code = 'print ("Hello World")\n# Test Program'
lexer = get_lexer_by_name("python3", stripall=True)
formatter = HtmlFormatter(linenos=False,style='colorful')
formatter.noclasses = True
result = highlight(code, lexer, formatter)
app = QApplication(sys.argv)
w=QWidget()
w.setGeometry(500,400,350,350)
area = QTextEdit(w)
area.setGeometry(0,10,350,340)
area.setText(result)
area.textChanged.connect(highlighter)
w.show()
sys.exit(app.exec_())
第一次加载时,它会正确输出,但如果我在 QTextEdit
中输入一个单词,它会等待 1-2 秒并显示以下错误:
Traceback (most recent call last): File "C:\Users\Home\Desktop\code_highlighter - Copy.py", line 10, in highlight er
result = highlight(text, lexer, formatter) File "C:\Python34\lib\site-packages\pygments\__init__.py", line 85, in highlig ht
return format(lex(code, lexer), formatter, outfile) File "C:\Python34\lib\site-packages\pygments\__init__.py", line 64, in format
formatter.format(tokens, realoutfile) File "C:\Python34\lib\site-packages\pygments\formatter.py", line 95, in format
return self.format_unencoded(tokensource, outfile) File "C:\Python34\lib\site-packages\pygments\formatters\html.py", line 850, in format_unencoded
for t, piece in source: File "C:\Python34\lib\site-packages\pygments\formatters\html.py", line 690, in _wrap_div
for tup in inner: File "C:\Python34\lib\site-packages\pygments\formatters\html.py", line 708, in _wrap_pre
for tup in inner: File "C:\Python34\lib\site-packages\pygments\formatters\html.py", line 727, in _format_lines
for ttype, value in tokensource: File "C:\Python34\lib\site-packages\pygments\lexer.py", line 191, in streamer
for _, t, v in self.get_tokens_unprocessed(text): File "C:\Python34\lib\site-packages\pygments\lexer.py", line 624, in get_token s_unprocessed
statestack = list(stack) RuntimeError: maximum recursion depth exceeded while calling a Python object Traceback (most recent call last): File "C:\Users\Home\Desktop\code_highlighter - Copy.py", line 10, in highlight er
result = highlight(text, lexer, formatter) File "C:\Python34\lib\site-packages\pygments\__init__.py", line 85, in highlig ht
return format(lex(code, lexer), formatter, outfile) File "C:\Python34\lib\site-packages\pygments\__init__.py", line 64, in format
formatter.format(tokens, realoutfile) File "C:\Python34\lib\site-packages\pygments\formatter.py", line 95, in format
return self.format_unencoded(tokensource, outfile) File "C:\Python34\lib\site-packages\pygments\formatters\html.py", line 850, in format_unencoded
for t, piece in source: File "C:\Python34\lib\site-packages\pygments\formatters\html.py", line 690, in _wrap_div
for tup in inner: File "C:\Python34\lib\site-packages\pygments\formatters\html.py", line 708, in _wrap_pre
for tup in inner: File "C:\Python34\lib\site-packages\pygments\formatters\html.py", line 727, in _format_lines
for ttype, value in tokensource: File "C:\Python34\lib\site-packages\pygments\lexer.py", line 191, in streamer
for _, t, v in self.get_tokens_unprocessed(text): File "C:\Python34\lib\site-packages\pygments\lexer.py", line 624, in get_token s_unprocessed
statestack = list(stack) RuntimeError: maximum recursion depth exceeded while calling a Python object
做了很多事都情不自禁。我不知道我哪里做错了。请帮助我。
最佳答案
您的 highlighter()
函数调用 area.setText()
,它将发出连接到 highlighter 的
,它调用textChanged
信号area.setText()
,其中...等等。
对于QTextEdit
,当调用setText()
方法时,总是会发出textChaged
信号,即使可见文本内容没有' t 实际上改变了,因为它的内部表示确实改变了。
针对您的情况,一个简单的解决方法是在调用 setText()
时阻止信号传递:
def highlighter():
text = area.toPlainText()
result = highlight(text, lexer, formatter)
area.blockSignals(True)
pos = area.textCursor().position()
area.setText(result)
cursor = area.textCursor()
cursor.setPosition(min(pos, len(area.toPlainText())))
area.setTextCursor(cursor)
area.blockSignals(False)
关于python - PyQt4 python 中的 "RuntimeError: maximum recursion depth exceeded while calling a Python object"错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42779349/