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from datetime import datetime
def print_header(title: str) -> None:
print(f"\n--- {title} ---\n")
def print_table(headers: list[str], rows: list[list[str]]) -> None:
if not rows:
print(" (empty)")
return
all_rows = [headers] + [[str(c) for c in row] for row in rows]
widths = [max(len(r[i]) for r in all_rows) for i in range(len(headers))]
fmt = " | ".join(f"{{:<{w}}}" for w in widths)
print(fmt.format(*headers))
print("-+-".join("-" * w for w in widths))
for row in all_rows[1:]:
print(fmt.format(*row))
def prompt_int(
prompt: str,
required: bool = True,
min_val: int | None = None,
max_val: int | None = None,
) -> int | None:
while True:
val = input(prompt).strip()
if not val:
if not required:
return None
print("This field is required.")
continue
try:
n = int(val)
except ValueError:
print("Please enter a valid integer.")
continue
if min_val is not None and n < min_val:
print(f"Must be at least {min_val}.")
continue
if max_val is not None and n > max_val:
print(f"Must be at most {max_val}.")
continue
return n
def prompt_str(prompt: str, required: bool = True) -> str | None:
while True:
val = input(prompt).strip()
if not val:
if not required:
return None
print("This field is required.")
continue
return val
def prompt_datetime(prompt: str, default_now: bool = True) -> str:
while True:
default = datetime.now().strftime("%Y-%m-%d %H")
val = input(f"{prompt} [{default}]: ").strip()
if not val:
if default_now:
return default
else:
try:
datetime.strptime(val, "%Y-%m-%d %H")
return val
except ValueError:
print("Invalid format. Use YYYY-MM-DD HH.")
continue
def confirm(prompt: str) -> bool:
val = input(f"{prompt} [y/N]: ").strip().lower()
return val == "y"
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