def generate_qr(data, output_path='qr_code.png'): """Generate simple QR code""" qr = qrcode.QRCode( version=1, error_correction=qrcode.constants.ERROR_CORRECT_L, box_size=10, border=4, ) qr.add_data(data) qr.make(fit=True)

img = qr.make_image(fill_color="black", back_color="white")
img.save(output_path)
return output_path

Usage

generate_qr('https://example.com', 'website_qr.png')


### WiFi QR Code

```python
def generate_wifi_qr(ssid, password, security='WPA', output='wifi_qr.png'):
    """
    Generate WiFi connection QR code
    Format: WIFI:S:ssid;T:security;P:password;;
    """
    wifi_string = f"WIFI:S:{ssid};T:{security};P:{password};;"
    return generate_qr(wifi_string, output)

# Usage
generate_wifi_qr('MyHomeNetwork', 'secret123', 'WPA')
# Scan to auto-connect to WiFi

Contact Card (vCard)

def generate_vcard_qr(name, phone, email, output='contact_qr.png'):
    """Generate vCard QR code"""
    vcard = f"""BEGIN:VCARD
VERSION:3.0
FN:{name}
TEL:{phone}
EMAIL:{email}
END:VCARD"""
    return generate_qr(vcard, output)

# Usage
generate_vcard_qr('John Doe', '+1234567890', 'john@example.com')

Styled QR Code

def generate_styled_qr(data, output='styled_qr.png', **kwargs):
    """Generate QR with custom styling"""
    qr = qrcode.QRCode(
        version=kwargs.get('version', 1),
        error_correction=getattr(
            qrcode.constants, 
            f"ERROR_CORRECT_{kwargs.get('error_correction', 'M')}"
        ),
        box_size=kwargs.get('box_size', 10),
        border=kwargs.get('border', 4),
    )
    qr.add_data(data)
    qr.make(fit=True)
    
    # Custom colors
    fill_color = kwargs.get('fill_color', 'black')
    back_color = kwargs.get('back_color', 'white')
    
    img = qr.make_image(fill_color=fill_color, back_color=back_color)
    img.save(output)
    return output

# Styled examples
generate_styled_qr('https://mysite.com', 'blue_qr.png', 
                   fill_color='blue', back_color='lightblue')

Error Correction Levels

Level	Correction	Use Case
L	~7%	Clean environments
M	~15%	Default, good balance
Q	~25%	Dirty/damaged possible
H	~30%	Logos/overlays on QR

Advanced Features

Batch Generate

def batch_generate(urls, output_dir='./qr_codes'):
    """Generate QR codes for multiple URLs"""
    import os
    os.makedirs(output_dir, exist_ok=True)
    
    generated = []
    for i, url in enumerate(urls, 1):
        output = f"{output_dir}/qr_{i:03d}.png"
        generate_qr(url, output)
        generated.append(output)
    
    return generated

# Usage
urls = [
    'https://product1.com',
    'https://product2.com',
    'https://product3.com'
]
batch_generate(urls)

Add Logo to Center

from PIL import Image

def add_logo_to_qr(qr_path, logo_path, output_path):
    """Add logo to center of QR code"""
    qr_img = Image.open(qr_path)
    logo_img = Image.open(logo_path)
    
    # Resize logo to fit in center
    box_size = min(qr_img.size) // 5
    logo_img = logo_img.resize((box_size, box_size))
    
    # Calculate position
    pos = ((qr_img.size[0] - box_size) // 2,
           (qr_img.size[1] - box_size) // 2)
    
    # Paste logo
    qr_img.paste(logo_img, pos, logo_img if logo_img.mode == 'RGBA' else None)
    qr_img.save(output_path)

Dependencies

pip install qrcode[pil]

qr-code-generator

QR Code Generator

When to Use

Quick Start

Basic URL QR Code