unicode greek character in output is garbled.

[sawyerzheng]

Feed in question: write a python function to convert all greek chars to latex expression, including varepsilon varphi varkapa

chatgpt-prompt result:

def greek_to_latex(string):
    greek_chars = {
        '�': '\\Alpha',
        '�': '\\Beta',
        '�': '\\Gamma',
        '�': '\\Delta',
        '�': '\\Epsilon',
        '�': '\\Zeta',
        '�': '\\Eta',
        '�': '\\Theta',
        '�': '\\Iota',
        '�': '\\Kappa',
        '�': '\\Lambda',
        '�': '\\Mu',
        '�': '\\Nu',
        '�': '\\Xi',
        '�': '\\Omicron',
        'Π': '\\Pi',
        'Ρ': '\\Rho',
        'Σ': '\\Sigma',
        'Τ': '\\Tau',
        'Î¥': '\\Upsilon',
        'Φ': '\\Phi',
        'Χ': '\\Chi',
        'Ψ': '\\Psi',
        'Ω': '\\Omega',
        'ε': '\\varepsilon',
        '

In the web browser of chatgpt is

def greek_to_latex(text):
    """
    Converts all Greek characters in a string to their LaTeX expression.

    Parameters:
    text (str): The string to be converted.

    Returns:
    str: The converted string.
    """
    greek_dict = {
        'α': r'\alpha',
        'β': r'\beta',
        'γ': r'\gamma',
        'δ': r'\delta',
        'ε': r'\epsilon',
        'ζ': r'\zeta',
        'η': r'\eta',
        'θ': r'\theta',
        'ι': r'\iota',
        'κ': r'\kappa',
        'λ': r'\lambda',
        'μ': r'\mu',
        'ν': r'\nu',
        'ξ': r'\xi',
        'ο': r'\omicron',
        'π': r'\pi',
        'ρ': r'\rho',
        'σ': r'\sigma',
        'τ': r'\tau',
        'υ': r'\upsilon',
        'φ': r'\phi',
        'χ': r'\chi',
        'ψ': r'\psi',
        'ω': r'\omega',
        'Α': r'A',
        'Β': r'B',
        'Γ': r'\Gamma',
        'Δ': r'\Delta',
        'Ε': r'E',
        'Ζ': r'Z',
        'Η': r'H',
        'Θ': r'\Theta',
        'Ι': r'I',
        'Κ': r'K',
        'Λ': r'\Lambda',
        'Μ': r'M',
        'Ν': r'N',
        'Ξ': r'\Xi',
        'Ο': r'O',
        'Π': r'\Pi',
        'Ρ': r'P',
        'Σ': r'\Sigma',
        'Τ': r'T',
        'Υ': r'\Upsilon',
        'Φ': r'\Phi',
        'Χ': r'X',
        'Ψ': r'\Psi',
        'Ω': r'\Omega',
        'ϵ': r'\varepsilon',
        'φ': r'\varphi',
        'ϰ': r'\varkappa'
    }

    # Convert each Greek character in the text to its LaTeX expression.
    converted_text = ''.join(greek_dict.get(c, c) for c in text)

    return converted_text