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from abc import ABC, abstractmethod
from typing import Any
class Field(ABC):
def __init__(
self,
name: str,
align: str = "<",
description: str = "",
placeholder: str = "",
total: bool = False,
):
"""
Cell specification.
:param name: name of the column
:param align: "<" | ">" | "=" | "^" https://docs.python.org/2/library/string.html#format-specification-mini-language
:param description: description for column name, will be printed in table legend,
specify it if you use abbr as name: ``name``="PP", ``description``="production points"
:param placeholder: placeholder for empty value
:param total: add total string
"""
self.name = name
self.align = align
self.description = description
self.placeholder = placeholder
if description:
self.name += "*"
self.total = total
def __repr__(self):
return f"{self.__class__.__name__}({self.name})"
def format_cell(self, item, width):
return f"{item:{self.align}{width}}"
def format_header(self, width):
return f"{self.name:<{width}}"
def make_cell_string(self, val):
if self.placeholder and not val:
return self.placeholder
else:
return self.convert_value_to_string(val)
def make_summary_value(self):
return ""
@abstractmethod
def convert_value_to_string(self, val: Any) -> str:
...
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