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import matplotlib.pyplot as plt

def plot_bar_chart(data):

    fig, ax = plt.subplots()
    labels = data['labels']
    values = data['values']
    
    for value in values:
        ax.bar(labels, value['data'], label=value['label'])
    
    ax.set_title('Bar Chart')
    ax.set_xlabel('Labels')
    ax.set_ylabel('Values')
    ax.legend()
    return fig
    
def plot_horizontal_bar_chart(data):
    fig, ax = plt.subplots()
    labels = data['labels']
    values = data['values']
    
    for value in values:
        ax.barh(labels, value['data'], label=value['label'])
    
    ax.set_title('Horizontal Bar Chart')
    ax.set_xlabel('Values')
    ax.set_ylabel('Labels')
    ax.legend()
    return fig
    
def plot_line_graph(data):
    fig, ax = plt.subplots()
    x_values = data['xValues']
    y_values_list = data['yValues']
    
    for y_values in y_values_list:
        label = y_values.get('label', None)
        ax.plot(x_values, y_values['data'], label=label)
    
    ax.set_title('Line Graph')
    ax.set_xlabel('X Values')
    ax.set_ylabel('Y Values')
    
    if any('label' in y_values for y_values in y_values_list):
        ax.legend()
    
    return fig

def plot_scatter(data):
    fig, ax = plt.subplots()
    for series in data['series']:
        x_values = [point['x'] for point in series['data']]
        y_values = [point['y'] for point in series['data']]
        label = series.get('label', None)
        ax.scatter(x_values, y_values, label=label)

    ax.set_title('Scatter Plot')
    ax.set_xlabel('X Values')
    ax.set_ylabel('Y Values')

    if any('label' in series for series in data['series']):
        ax.legend()

    return fig
    
def plot_pie(data):
    values = [item['value'] for item in data]
    labels = [item['label'] for item in data]

    fig, ax = plt.subplots()
    wedges, texts, autotexts = ax.pie(values, labels=labels, autopct='%1.1f%%', startangle=140)
    ax.set_title('Pie Chart')

    for text in texts + autotexts:
        text.set_fontsize(10)

    return fig