Pythonista Lab 1.0(8) crashes when running "Run Python Code Cell"-Shortcut

[RichardPotthoff]

I have defined a shortcut with the following Python code, which I took from a working Pythonista script:

import reminders
import sys
import socket
import os
import unicodedata

# Printer configuration
PRINTER_IP = "10.0.0.188"  # Your printer's reserved DHCP IP address
PRINTER_PORT = 9100  # HP JetDirect port for raw printing

# HP Roman-8 mapping dictionary (Unicode char to Roman-8 byte)
utf8_lookup=[bytes(escape, 'utf-8').decode('unicode_escape') for escape in['\\u0000', '\\u0001', '\\u0002', '\\u0003', '\\u0004', '\\u0005', '\\u0006', '\\u0007', '\\u0008', '\\u0009', '\\u000A', '\\u000B', '\\u000C', '\\u000D', '\\u000E', '\\u000F', '\\u0010', '\\u0011', '\\u0012', '\\u0013', '\\u0014', '\\u0015', '\\u0016', '\\u0017', '\\u0018', '\\u0019', '\\u001A', '\\u001B', '\\u001C', '\\u001D', '\\u001E', '\\u001F', '\\u0020', '\\u0021', '\\u0022', '\\u0023', '\\u0024', '\\u0025', '\\u0026', '\\u0027', '\\u0028', '\\u0029', '\\u002A', '\\u002B', '\\u002C', '\\u002D', '\\u002E', '\\u002F', '\\u0030', '\\u0031', '\\u0032', '\\u0033', '\\u0034', '\\u0035', '\\u0036', '\\u0037', '\\u0038', '\\u0039', '\\u003A', '\\u003B', '\\u003C', '\\u003D', '\\u003E', '\\u003F', '\\u0040', '\\u0041', '\\u0042', '\\u0043', '\\u0044', '\\u0045', '\\u0046', '\\u0047', '\\u0048', '\\u0049', '\\u004A', '\\u004B', '\\u004C', '\\u004D', '\\u004E', '\\u004F', '\\u0050', '\\u0051', '\\u0052', '\\u0053', '\\u0054', '\\u0055', '\\u0056', '\\u0057', '\\u0058', '\\u0059', '\\u005A', '\\u005B', '\\u005C', '\\u005D', '\\u005E', '\\u005F', '\\u0060', '\\u0061', '\\u0062', '\\u0063', '\\u0064', '\\u0065', '\\u0066', '\\u0067', '\\u0068', '\\u0069', '\\u006A', '\\u006B', '\\u006C', '\\u006D', '\\u006E', '\\u006F', '\\u0070', '\\u0071', '\\u0072', '\\u0073', '\\u0074', '\\u0075', '\\u0076', '\\u0077', '\\u0078', '\\u0079', '\\u007A', '\\u007B', '\\u007C', '\\u007D', '\\u007E', '\\u007F', '\\u0080', '\\u0081', '\\u0082', '\\u0083', '\\u0084', '\\u0085', '\\u0086', '\\u0087', '\\u0088', '\\u0089', '\\u008A', '\\u008B', '\\u008C', '\\u008D', '\\u008E', '\\u008F', '\\u0090', '\\u0091', '\\u0092', '\\u0093', '\\u0094', '\\u0095', '\\u0096', '\\u0097', '\\u0098', '\\u0099', '\\u009A', '\\u009B', '\\u009C', '\\u009D', '\\u009E', '\\u009F', '\\u00A0', '\\u00C0', '\\u00C2', '\\u00C8', '\\u00CA', '\\u00CB', '\\u00CE', '\\u00CF', '\\u00B4', '\\u2035', '\\u2227', '\\u00A8', '\\u223C', '\\u00D9', '\\u00DB', '\\u20A4', '\\u00AF', '\\u00DD', '\\u00FD', '\\u00B0', '\\u00C7', '\\u00E7', '\\u00D1', '\\u00F1', '\\u00A1', '\\u00BF', '\\u00A4', '\\u00A3', '\\u00A5', '\\u00A7', '\\u0192', '\\u00A2', '\\u00E2', '\\u00EA', '\\u00F4', '\\u00FB', '\\u00E1', '\\u00E9', '\\u00F3', '\\u00FA', '\\u00E0', '\\u00E8', '\\u00F2', '\\u00F9', '\\u00E4', '\\u00EB', '\\u00F6', '\\u00FC', '\\u00C5', '\\u00EE', '\\u00D8', '\\u00C6', '\\u00E5', '\\u00ED', '\\u00F8', '\\u00E6', '\\u00C4', '\\u00EC', '\\u00D6', '\\u00DC', '\\u00C9', '\\u00EF', '\\u00DF', '\\u00D4', '\\u00C1', '\\u00C3', '\\u00E3', '\\u00D0', '\\u00F0', '\\u00CD', '\\u00CC', '\\u00D3', '\\u00D2', '\\u00D5', '\\u00F5', '\\u0160', '\\u0161', '\\u00DA', '\\u0178', '\\u00FF', '\\u00DE', '\\u00FE', '\\u00B7', '\\u00B5', '\\u00B6', '\\u00BE', '\\u2014', '\\u00BC', '\\u00BD', '\\u00AA', '\\u00BA', '\\u00AB', '\\u25A0', '\\u00BB', '\\u00B1','']]
roman8_map = {key:i for i,key in enumerate(utf8_lookup)}
roman8_map['\u2044']=ord('/') 
def send_to_printer(data):
    """Send raw byte data to the HP CP1525nw via JetDirect."""
    try:
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
            s.settimeout(5)
            s.connect((PRINTER_IP, PRINTER_PORT))
            
            pcl_header = (
                b"\x1b%-12345X@PJL\n"
                b"@PJL JOB NAME=\"Shopping List\"\n"
                b"@PJL SET ECONOMODE=ON\n"
                b"@PJL SET RESOLUTION=600\n"
                b"@PJL ENTER LANGUAGE=PCL\n"
                b"\x1b&l0O"
                b"\x1b&l0E"
                b"\x1b&a0L"
                b"\x1b*p0x150Y"
                b"\x1b(8U"  # HP Roman-8 symbol set
                b"\x1b(s0P"
                b"\x1b(s10V"
                b"\x1b&l4D"
            )
            pcl_footer = (
                b"\x1b&l0H"
                b"\x1b%-12345X@PJL EOJ\n"
            )
            
            s.sendall(pcl_header + data + pcl_footer)
            
        print("Print job sent successfully!")
        return True
    except (socket.timeout, socket.error) as e:
        print(f"Failed to connect to printer: {e}")
        return False

def unicode_to_roman8(text):
    """Convert Unicode string to HP Roman-8 byte string."""
    # Normalize to NFC to handle decomposed characters (e.g., "u\u0308" -> "ü")
    text = unicodedata.normalize('NFC', text)
    
    # Convert each character to Roman-8 bytes
    result = bytearray()
    for char in text:
        if ord(char) < 0x80:  # ASCII range
            result.append(ord(char))
        elif char in roman8_map:  # Extended Roman-8 range
            result.append(roman8_map[char])
        else:  # Fallback for unmapped characters
            result.append(ord('?'))
    return bytes(result)

def main():
    ListName = sys.argv[1] if len(sys.argv) > 1 else 'Shopping'
    
    calendars = {calendar.title: calendar for calendar in reminders.get_all_calendars()}
    if ListName not in calendars:
        print(f'Calendar "{ListName}" not found.')
        return
    
    todo = reminders.get_reminders(calendar=calendars[ListName], completed=False)
    
    # Format shopping list as plain text, only items, with carriage returns
    data = "\r\n".join(r.title for r in todo)
    if not data:
        data = "No items in list"
    data += "\r\n"
    
    # Convert to Roman-8 bytes
    data_roman8 = unicode_to_roman8(data)
    
    success = send_to_printer(data_roman8)
    
    if success:
        print(f'{ListName} List printed!')
    else:
        print(f'Failed to print {ListName} List.')

if __name__ == '__main__':
    print(f'argv: {sys.argv}')
    main()

The problem may not be the shortcut, as Pythonista Lab also crashes when I try to run this Python script directly in Pythonista Lab.

The code runs fine in Pythonista3.

[RichardPotthoff]

I have tried another "Run Pyrhon Code Cell" shortcut, and that works:

import sys
import socket
import os
from datetime import datetime

# Printer configuration
PRINTER_IP = "10.0.0.188"  # Your printer's reserved DHCP IP address
PRINTER_PORT = 9100  # HP JetDirect port for raw printing

# Check dimensions and centering (in mm)
CHECK_HEIGHT = 70  # Check height in landscape
CHECK_WIDTH = 152.5  # Check width in landscape
CARRIER_WIDTH = 297  # A4 landscape width
CARRIER_HEIGHT = 210  # A4 landscape height
OFFSET_X = (CARRIER_WIDTH - CHECK_WIDTH) / 2  # ~72.25mm
OFFSET_Y = (CARRIER_HEIGHT - CHECK_HEIGHT) / 2  # ~70mm

# Convert mm to 1/300 inch units for PCL
MM_TO_UNITS = 11.81  # 1mm ≈ 11.81 units (300 DPI)

# Field positions (x, y in mm, bottom-left of field) and lengths (mm)
FIELD_POSITIONS = {
    "date": {"pos": (100, 20), "length": 28},
    "payee": {"pos": (22, 30), "length": 90},
    "amount_numeric": {"pos": (121, 30), "length": 23},
    "amount_written": {"pos": (10, 38), "length": 105},
    "memo": {"pos": (16, 57), "length": 50} 
}

# Test mode placeholders
TEST_PLACEHOLDERS = {
    "date": "YYYY/MM/DD",
    "payee": "X" * 36,  # ~90mm at ~2.5mm/char
    "amount_numeric": "9999.99",
    "amount_written": "X" * 42,  # ~105mm
    "memo": "X" * 20  # ~50mm
}

def mm_to_units(mm):
    """Convert mm to 1/300 inch units."""
    return int(mm * MM_TO_UNITS)

def fill_field(text, field_length_mm):
    """Fill field to approximate length with asterisks, except for date."""
    chars_per_mm = 0.4  # ~2.5mm/char at 10-point fixed-pitch (~10 chars/inch)
    max_chars = int(field_length_mm * chars_per_mm)
    #text = text[:max_chars]  # Truncate if too long
    return text + "*" * max(0,(max_chars - len(text)))  # Pad with asterisks

def send_to_printer(data):
    """Send raw text data to the HP CP1525nw via JetDirect."""
    try:
        # Create a socket connection
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
            s.settimeout(5)  # 5-second timeout for connection
            s.connect((PRINTER_IP, PRINTER_PORT))
            
            # PCL commands for grayscale, landscape, minimal margins
            pcl_header = (
                "\x1b%-12345X@PJL\n"  # Universal Exit Language (UEL)
                "@PJL JOB NAME=\"Check\"\n"
                "@PJL SET ECONOMODE=ON\n"  # Enable grayscale/economy mode
                "@PJL SET RESOLUTION=600\n"  # 600 DPI resolution
                "@PJL ENTER LANGUAGE=PCL\n"
                "\x1b&l1O"  # Landscape orientation
                "\x1b&l0E"  # Top margin (0 lines)
                "\x1b&a0L"  # Left margin (0 columns)
                "\x1b*p0x150Y"  # Cursor to 5mm down to avoid clipping
                "\x1b(8U"  # Symbol set (Roman-8, suitable for text)
                "\x1b(s0P"  # Fixed pitch font
                "\x1b(s10V"  # Font size (10 points)
                "\x1b&l4D"  # Line spacing (4 lines per inch, ~1.5 spacing)
            )
            pcl_footer = (
                "\x1b&l0H"  # Form feed to eject page
                "\x1b%-12345X@PJL EOJ\n"  # End of job
            )
            
            # Send data
            s.sendall((pcl_header + data + pcl_footer).encode())
            
        print("Check sent successfully!")
        return True
    except (socket.timeout, socket.error) as e:
        print(f"Failed to connect to printer: {e}")
        return False

def main(args):
    # Check if arguments are provided (len=1 means only script name)
    if len(args) == 1:
        # Test mode: Print "+" at corners (centered on corners) and placeholders
        corners = [
            (0, 0),  # Top-left
            (CHECK_WIDTH, 0),  # Top-right
            (0, CHECK_HEIGHT),  # Bottom-left
            (CHECK_WIDTH, CHECK_HEIGHT)  # Bottom-right
        ]
        data = ""
        # Corner markers, shifted 1.25mm left (-15 units), 1.5mm down (+18 units)
        for x, y in corners:
            px = mm_to_units(x + OFFSET_X) - 15  # Shift left 1.25mm
            py = mm_to_units(y + OFFSET_Y) + 18  # Shift down 1.5mm
            data += f"\x1b*p{px}x{py}Y+\r\n"
        # Field markers
        for field, info in FIELD_POSITIONS.items():
            x, y = info["pos"]
            px = mm_to_units(x + OFFSET_X)
            py = mm_to_units(y + OFFSET_Y)
            text=TEST_PLACEHOLDERS[field]
            if field=="amount_numeric":
               text = fill_field(f'{float(text):0,.2f}', info["length"])
            data += f"\x1b*p{px}x{py}Y{text}\r\n"
    else:
        # Real mode: Get check data from arguments, no corner markers
        check_data = {
            "date": args[1] if len(args) > 1 else "TEST_DATE",
            "payee": args[2] if len(args) > 2 else "TEST_PAYEE",
            "amount_numeric": args[3] if len(args) > 3 else "TEST_AMOUNT",
            "amount_written": args[4] if len(args) > 4 else "TEST_AMOUNT_WRITTEN",
            "memo": args[5] if len(args) > 5 else "TEST_MEMO"
        }
        
        # Format check data with PCL cursor positioning
        data = ""
        for field, info in FIELD_POSITIONS.items():
            x, y = info["pos"]
            px = mm_to_units(x + OFFSET_X)
            py = mm_to_units(y + OFFSET_Y)
            text=check_data[field]
            if field=="amount_numeric":
               text = fill_field(f'{float(text):0,.2f}', info["length"])
            data += f"\x1b*p{px}x{py}Y{text}\r\n"
    
    # Send to printer
    success = send_to_printer(data)
    
    if success:
        print("Check printed!" if len(args) > 1 else "Test pattern printed!")
    else:
        print("Failed to print check.")

if __name__ == '__main__':
    if "args" in globals():  # used as PythonistaLab shortcut?  
      args.insert(0,'printCheck.py')
    else:
      args=sys.argv
    print(f'{args = }')
    main(args)

The crash of PythonistaLab seems to be caused by the get_reminders call in the original example.