在 python prompt-toolkit-3.0.2 上添加键绑定会破坏建议和历史搜索

Question

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：添加新的绑定后，历史和建议功能停止工作。

我尝试使用 load_basic_bindings 但它没有帮助。

如果我再次评论键绑定，建议和历史性工作。

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)

Answer 1

如果我使用load_basic_bindings()我可以使用Alt+Enter接受命令并将其添加到历史记录中。
对于#我必须添加将命令添加到历史记录的函数

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

使用箭头，我可以从历史中进行选择。 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)