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我正在尝试添加一种不同的方式来完成多行输入。应该很简单，但我得到了一个意想不到的结果：添加新绑定后，历史记录和建议功能停止工作。

我尝试使用 load_basic_bindings 但它没有帮助。

如果我对键绑定、建议和历史工作再次发表评论。

from prompt_toolkit import PromptSession
from prompt_toolkit.auto_suggest import AutoSuggestFromHistory
from prompt_toolkit.key_binding import KeyBindings

session = PromptSession()

# load empty binds
bindings = KeyBindings()

# reading from the basic binds did not work either
# bindings = load_basic_bindings()

# HERE IS THE PROBLEM
# After adding this the history and suggest stop working
# should just add a new way to exit
# I have tested with the eager True and False, with no changes
@bindings.add('#')
def _(event):
    event.app.exit(result=event.app.current_buffer.text)

while True:
    text = session.prompt(
        '> ',
        auto_suggest=AutoSuggestFromHistory(),
        key_bindings=bindings,     # if I comment the key bindings, the history and search work againg
        multiline=True,            # this bug just happens on multiline, if put this False the bug does not happens
        enable_history_search=True
    )
    print('You said: %s' % text)
4

1 回答 1

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如果我使用load_basic_bindings()，我可以接受使用命令Alt+Enter并将其添加到历史记录中。
因为#我必须添加将命令添加到历史记录的功能

session.history.append_string(event.app.current_buffer.text)

使用箭头我可以从历史中选择。它显示了历史的建议。

在 Linux Mint 19.2（基于 Ubuntu 18.04）、Python 3.7.6、Prompt Toolkit 3.0.2 上测试

from prompt_toolkit import PromptSession
from prompt_toolkit.auto_suggest import AutoSuggestFromHistory
from prompt_toolkit.key_binding import KeyBindings
from prompt_toolkit.key_binding.bindings.basic import load_basic_bindings

session = PromptSession()

# load empty binds
#bindings = KeyBindings()

# reading from the basic binds did not work either
bindings = load_basic_bindings()

# HERE IS THE PROBLEM
# After adding this the history and suggest stop working
# should just add a new way to exit
# I have tested with the eager True and False, with no changes
@bindings.add('#')
def _(event):
    session.history.append_string(event.app.current_buffer.text)
    event.app.exit(result=event.app.current_buffer.text)

while True:
    text = session.prompt(
        '> ',
        auto_suggest=AutoSuggestFromHistory(),
        key_bindings=bindings,     # if I comment the key bindings, the history and search work againg
        multiline=True,            # this bug just happens on multiline, if put this False the bug does not happens
        enable_history_search=True
    )
    print('You said: %s' % text)
于 2020-01-10T05:12:42.320 回答