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import math
from functools import lru_cache
from time import monotonic
from typing import Iterable, List, Optional
from .color import Color, blend_rgb
from .color_triplet import ColorTriplet
from .console import Console, ConsoleOptions, RenderResult
from .jupyter import JupyterMixin
from .measure import Measurement
from .segment import Segment
from .style import Style, StyleType
# Number of characters before 'pulse' animation repeats
PULSE_SIZE = 20
class ProgressBar(JupyterMixin):
"""Renders a (progress) bar. Used by rich.progress.
Args:
total (float, optional): Number of steps in the bar. Defaults to 100. Set to None to render a pulsing animation.
completed (float, optional): Number of steps completed. Defaults to 0.
width (int, optional): Width of the bar, or ``None`` for maximum width. Defaults to None.
pulse (bool, optional): Enable pulse effect. Defaults to False. Will pulse if a None total was passed.
style (StyleType, optional): Style for the bar background. Defaults to "bar.back".
complete_style (StyleType, optional): Style for the completed bar. Defaults to "bar.complete".
finished_style (StyleType, optional): Style for a finished bar. Defaults to "bar.finished".
pulse_style (StyleType, optional): Style for pulsing bars. Defaults to "bar.pulse".
animation_time (Optional[float], optional): Time in seconds to use for animation, or None to use system time.
"""
def __init__(
self,
total: Optional[float] = 100.0,
completed: float = 0,
width: Optional[int] = None,
pulse: bool = False,
style: StyleType = "bar.back",
complete_style: StyleType = "bar.complete",
finished_style: StyleType = "bar.finished",
pulse_style: StyleType = "bar.pulse",
animation_time: Optional[float] = None,
):
self.total = total
self.completed = completed
self.width = width
self.pulse = pulse
self.style = style
self.complete_style = complete_style
self.finished_style = finished_style
self.pulse_style = pulse_style
self.animation_time = animation_time
self._pulse_segments: Optional[List[Segment]] = None
def __repr__(self) -> str:
return f"<Bar {self.completed!r} of {self.total!r}>"
@property
def percentage_completed(self) -> Optional[float]:
"""Calculate percentage complete."""
if self.total is None:
return None
completed = (self.completed / self.total) * 100.0
completed = min(100, max(0.0, completed))
return completed
@lru_cache(maxsize=16)
def _get_pulse_segments(
self,
fore_style: Style,
back_style: Style,
color_system: str,
no_color: bool,
ascii: bool = False,
) -> List[Segment]:
"""Get a list of segments to render a pulse animation.
Returns:
List[Segment]: A list of segments, one segment per character.
"""
bar = "-" if ascii else ""
segments: List[Segment] = []
if color_system not in ("standard", "eight_bit", "truecolor") or no_color:
segments += [Segment(bar, fore_style)] * (PULSE_SIZE // 2)
segments += [Segment(" " if no_color else bar, back_style)] * (
PULSE_SIZE - (PULSE_SIZE // 2)
)
return segments
append = segments.append
fore_color = (
fore_style.color.get_truecolor()
if fore_style.color
else ColorTriplet(255, 0, 255)
)
back_color = (
back_style.color.get_truecolor()
if back_style.color
else ColorTriplet(0, 0, 0)
)
cos = math.cos
pi = math.pi
_Segment = Segment
_Style = Style
from_triplet = Color.from_triplet
for index in range(PULSE_SIZE):
position = index / PULSE_SIZE
fade = 0.5 + cos(position * pi * 2) / 2.0
color = blend_rgb(fore_color, back_color, cross_fade=fade)
append(_Segment(bar, _Style(color=from_triplet(color))))
return segments
def update(self, completed: float, total: Optional[float] = None) -> None:
"""Update progress with new values.
Args:
completed (float): Number of steps completed.
total (float, optional): Total number of steps, or ``None`` to not change. Defaults to None.
"""
self.completed = completed
self.total = total if total is not None else self.total
def _render_pulse(
self, console: Console, width: int, ascii: bool = False
) -> Iterable[Segment]:
"""Renders the pulse animation.
Args:
console (Console): Console instance.
width (int): Width in characters of pulse animation.
Returns:
RenderResult: [description]
Yields:
Iterator[Segment]: Segments to render pulse
"""
fore_style = console.get_style(self.pulse_style, default="white")
back_style = console.get_style(self.style, default="black")
pulse_segments = self._get_pulse_segments(
fore_style, back_style, console.color_system, console.no_color, ascii=ascii
)
segment_count = len(pulse_segments)
current_time = (
monotonic() if self.animation_time is None else self.animation_time
)
segments = pulse_segments * (int(width / segment_count) + 2)
offset = int(-current_time * 15) % segment_count
segments = segments[offset : offset + width]
yield from segments
def __rich_console__(
self, console: Console, options: ConsoleOptions
) -> RenderResult:
width = min(self.width or options.max_width, options.max_width)
ascii = options.legacy_windows or options.ascii_only
should_pulse = self.pulse or self.total is None
if should_pulse:
yield from self._render_pulse(console, width, ascii=ascii)
return
completed: Optional[float] = (
min(self.total, max(0, self.completed)) if self.total is not None else None
)
bar = "-" if ascii else ""
half_bar_right = " " if ascii else ""
half_bar_left = " " if ascii else ""
complete_halves = (
int(width * 2 * completed / self.total)
if self.total and completed is not None
else width * 2
)
bar_count = complete_halves // 2
half_bar_count = complete_halves % 2
style = console.get_style(self.style)
is_finished = self.total is None or self.completed >= self.total
complete_style = console.get_style(
self.finished_style if is_finished else self.complete_style
)
_Segment = Segment
if bar_count:
yield _Segment(bar * bar_count, complete_style)
if half_bar_count:
yield _Segment(half_bar_right * half_bar_count, complete_style)
if not console.no_color:
remaining_bars = width - bar_count - half_bar_count
if remaining_bars and console.color_system is not None:
if not half_bar_count and bar_count:
yield _Segment(half_bar_left, style)
remaining_bars -= 1
if remaining_bars:
yield _Segment(bar * remaining_bars, style)
def __rich_measure__(
self, console: Console, options: ConsoleOptions
) -> Measurement:
return (
Measurement(self.width, self.width)
if self.width is not None
else Measurement(4, options.max_width)
)
if __name__ == "__main__": # pragma: no cover
console = Console()
bar = ProgressBar(width=50, total=100)
import time
console.show_cursor(False)
for n in range(0, 101, 1):
bar.update(n)
console.print(bar)
console.file.write("\r")
time.sleep(0.05)
console.show_cursor(True)
console.print()

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from typing import Any, Generic, List, Optional, TextIO, TypeVar, Union, overload
from . import get_console
from .console import Console
from .text import Text, TextType
PromptType = TypeVar("PromptType")
DefaultType = TypeVar("DefaultType")
class PromptError(Exception):
"""Exception base class for prompt related errors."""
class InvalidResponse(PromptError):
"""Exception to indicate a response was invalid. Raise this within process_response() to indicate an error
and provide an error message.
Args:
message (Union[str, Text]): Error message.
"""
def __init__(self, message: TextType) -> None:
self.message = message
def __rich__(self) -> TextType:
return self.message
class PromptBase(Generic[PromptType]):
"""Ask the user for input until a valid response is received. This is the base class, see one of
the concrete classes for examples.
Args:
prompt (TextType, optional): Prompt text. Defaults to "".
console (Console, optional): A Console instance or None to use global console. Defaults to None.
password (bool, optional): Enable password input. Defaults to False.
choices (List[str], optional): A list of valid choices. Defaults to None.
case_sensitive (bool, optional): Matching of choices should be case-sensitive. Defaults to True.
show_default (bool, optional): Show default in prompt. Defaults to True.
show_choices (bool, optional): Show choices in prompt. Defaults to True.
"""
response_type: type = str
validate_error_message = "[prompt.invalid]Please enter a valid value"
illegal_choice_message = (
"[prompt.invalid.choice]Please select one of the available options"
)
prompt_suffix = ": "
choices: Optional[List[str]] = None
def __init__(
self,
prompt: TextType = "",
*,
console: Optional[Console] = None,
password: bool = False,
choices: Optional[List[str]] = None,
case_sensitive: bool = True,
show_default: bool = True,
show_choices: bool = True,
) -> None:
self.console = console or get_console()
self.prompt = (
Text.from_markup(prompt, style="prompt")
if isinstance(prompt, str)
else prompt
)
self.password = password
if choices is not None:
self.choices = choices
self.case_sensitive = case_sensitive
self.show_default = show_default
self.show_choices = show_choices
@classmethod
@overload
def ask(
cls,
prompt: TextType = "",
*,
console: Optional[Console] = None,
password: bool = False,
choices: Optional[List[str]] = None,
case_sensitive: bool = True,
show_default: bool = True,
show_choices: bool = True,
default: DefaultType,
stream: Optional[TextIO] = None,
) -> Union[DefaultType, PromptType]:
...
@classmethod
@overload
def ask(
cls,
prompt: TextType = "",
*,
console: Optional[Console] = None,
password: bool = False,
choices: Optional[List[str]] = None,
case_sensitive: bool = True,
show_default: bool = True,
show_choices: bool = True,
stream: Optional[TextIO] = None,
) -> PromptType:
...
@classmethod
def ask(
cls,
prompt: TextType = "",
*,
console: Optional[Console] = None,
password: bool = False,
choices: Optional[List[str]] = None,
case_sensitive: bool = True,
show_default: bool = True,
show_choices: bool = True,
default: Any = ...,
stream: Optional[TextIO] = None,
) -> Any:
"""Shortcut to construct and run a prompt loop and return the result.
Example:
>>> filename = Prompt.ask("Enter a filename")
Args:
prompt (TextType, optional): Prompt text. Defaults to "".
console (Console, optional): A Console instance or None to use global console. Defaults to None.
password (bool, optional): Enable password input. Defaults to False.
choices (List[str], optional): A list of valid choices. Defaults to None.
case_sensitive (bool, optional): Matching of choices should be case-sensitive. Defaults to True.
show_default (bool, optional): Show default in prompt. Defaults to True.
show_choices (bool, optional): Show choices in prompt. Defaults to True.
stream (TextIO, optional): Optional text file open for reading to get input. Defaults to None.
"""
_prompt = cls(
prompt,
console=console,
password=password,
choices=choices,
case_sensitive=case_sensitive,
show_default=show_default,
show_choices=show_choices,
)
return _prompt(default=default, stream=stream)
def render_default(self, default: DefaultType) -> Text:
"""Turn the supplied default in to a Text instance.
Args:
default (DefaultType): Default value.
Returns:
Text: Text containing rendering of default value.
"""
return Text(f"({default})", "prompt.default")
def make_prompt(self, default: DefaultType) -> Text:
"""Make prompt text.
Args:
default (DefaultType): Default value.
Returns:
Text: Text to display in prompt.
"""
prompt = self.prompt.copy()
prompt.end = ""
if self.show_choices and self.choices:
_choices = "/".join(self.choices)
choices = f"[{_choices}]"
prompt.append(" ")
prompt.append(choices, "prompt.choices")
if (
default != ...
and self.show_default
and isinstance(default, (str, self.response_type))
):
prompt.append(" ")
_default = self.render_default(default)
prompt.append(_default)
prompt.append(self.prompt_suffix)
return prompt
@classmethod
def get_input(
cls,
console: Console,
prompt: TextType,
password: bool,
stream: Optional[TextIO] = None,
) -> str:
"""Get input from user.
Args:
console (Console): Console instance.
prompt (TextType): Prompt text.
password (bool): Enable password entry.
Returns:
str: String from user.
"""
return console.input(prompt, password=password, stream=stream)
def check_choice(self, value: str) -> bool:
"""Check value is in the list of valid choices.
Args:
value (str): Value entered by user.
Returns:
bool: True if choice was valid, otherwise False.
"""
assert self.choices is not None
if self.case_sensitive:
return value.strip() in self.choices
return value.strip().lower() in [choice.lower() for choice in self.choices]
def process_response(self, value: str) -> PromptType:
"""Process response from user, convert to prompt type.
Args:
value (str): String typed by user.
Raises:
InvalidResponse: If ``value`` is invalid.
Returns:
PromptType: The value to be returned from ask method.
"""
value = value.strip()
try:
return_value: PromptType = self.response_type(value)
except ValueError:
raise InvalidResponse(self.validate_error_message)
if self.choices is not None:
if not self.check_choice(value):
raise InvalidResponse(self.illegal_choice_message)
if not self.case_sensitive:
# return the original choice, not the lower case version
return_value = self.response_type(
self.choices[
[choice.lower() for choice in self.choices].index(value.lower())
]
)
return return_value
def on_validate_error(self, value: str, error: InvalidResponse) -> None:
"""Called to handle validation error.
Args:
value (str): String entered by user.
error (InvalidResponse): Exception instance the initiated the error.
"""
self.console.print(error)
def pre_prompt(self) -> None:
"""Hook to display something before the prompt."""
@overload
def __call__(self, *, stream: Optional[TextIO] = None) -> PromptType:
...
@overload
def __call__(
self, *, default: DefaultType, stream: Optional[TextIO] = None
) -> Union[PromptType, DefaultType]:
...
def __call__(self, *, default: Any = ..., stream: Optional[TextIO] = None) -> Any:
"""Run the prompt loop.
Args:
default (Any, optional): Optional default value.
Returns:
PromptType: Processed value.
"""
while True:
self.pre_prompt()
prompt = self.make_prompt(default)
value = self.get_input(self.console, prompt, self.password, stream=stream)
if value == "" and default != ...:
return default
try:
return_value = self.process_response(value)
except InvalidResponse as error:
self.on_validate_error(value, error)
continue
else:
return return_value
class Prompt(PromptBase[str]):
"""A prompt that returns a str.
Example:
>>> name = Prompt.ask("Enter your name")
"""
response_type = str
class IntPrompt(PromptBase[int]):
"""A prompt that returns an integer.
Example:
>>> burrito_count = IntPrompt.ask("How many burritos do you want to order")
"""
response_type = int
validate_error_message = "[prompt.invalid]Please enter a valid integer number"
class FloatPrompt(PromptBase[float]):
"""A prompt that returns a float.
Example:
>>> temperature = FloatPrompt.ask("Enter desired temperature")
"""
response_type = float
validate_error_message = "[prompt.invalid]Please enter a number"
class Confirm(PromptBase[bool]):
"""A yes / no confirmation prompt.
Example:
>>> if Confirm.ask("Continue"):
run_job()
"""
response_type = bool
validate_error_message = "[prompt.invalid]Please enter Y or N"
choices: List[str] = ["y", "n"]
def render_default(self, default: DefaultType) -> Text:
"""Render the default as (y) or (n) rather than True/False."""
yes, no = self.choices
return Text(f"({yes})" if default else f"({no})", style="prompt.default")
def process_response(self, value: str) -> bool:
"""Convert choices to a bool."""
value = value.strip().lower()
if value not in self.choices:
raise InvalidResponse(self.validate_error_message)
return value == self.choices[0]
if __name__ == "__main__": # pragma: no cover
from pip._vendor.rich import print
if Confirm.ask("Run [i]prompt[/i] tests?", default=True):
while True:
result = IntPrompt.ask(
":rocket: Enter a number between [b]1[/b] and [b]10[/b]", default=5
)
if result >= 1 and result <= 10:
break
print(":pile_of_poo: [prompt.invalid]Number must be between 1 and 10")
print(f"number={result}")
while True:
password = Prompt.ask(
"Please enter a password [cyan](must be at least 5 characters)",
password=True,
)
if len(password) >= 5:
break
print("[prompt.invalid]password too short")
print(f"password={password!r}")
fruit = Prompt.ask("Enter a fruit", choices=["apple", "orange", "pear"])
print(f"fruit={fruit!r}")
doggie = Prompt.ask(
"What's the best Dog? (Case INSENSITIVE)",
choices=["Border Terrier", "Collie", "Labradoodle"],
case_sensitive=False,
)
print(f"doggie={doggie!r}")
else:
print("[b]OK :loudly_crying_face:")

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from typing import Any, cast, Set, TYPE_CHECKING
from inspect import isclass
if TYPE_CHECKING:
from pip._vendor.rich.console import RenderableType
_GIBBERISH = """aihwerij235234ljsdnp34ksodfipwoe234234jlskjdf"""
def is_renderable(check_object: Any) -> bool:
"""Check if an object may be rendered by Rich."""
return (
isinstance(check_object, str)
or hasattr(check_object, "__rich__")
or hasattr(check_object, "__rich_console__")
)
def rich_cast(renderable: object) -> "RenderableType":
"""Cast an object to a renderable by calling __rich__ if present.
Args:
renderable (object): A potentially renderable object
Returns:
object: The result of recursively calling __rich__.
"""
from pip._vendor.rich.console import RenderableType
rich_visited_set: Set[type] = set() # Prevent potential infinite loop
while hasattr(renderable, "__rich__") and not isclass(renderable):
# Detect object which claim to have all the attributes
if hasattr(renderable, _GIBBERISH):
return repr(renderable)
cast_method = getattr(renderable, "__rich__")
renderable = cast_method()
renderable_type = type(renderable)
if renderable_type in rich_visited_set:
break
rich_visited_set.add(renderable_type)
return cast(RenderableType, renderable)