Python matplotlib.font_manager() Examples

def plot_disp(ax, tws, top_plot, font_size):
    S = [p.s for p in tws]#map(lambda p:p.s, tws)
    d_Ftop = []
    Fmin = []
    Fmax = []
    for elem in top_plot:
        Ftop = [p.__dict__[elem] for p in tws]

        Fmin.append(min(Ftop))
        Fmax.append(max(Ftop))
        greek = ""
        if "beta" in elem or "alpha" in elem or "mu" in elem:
            greek = "\\"
        if "mu" in elem:
            elem = elem.replace("mu", "mu_")
        top_label = r"$" + greek + elem+"$"
        ax.plot(S, Ftop, lw = 2, label=top_label)
        d_Ftop.append( max(Ftop) - min(Ftop))
    d_F = max(d_Ftop)
    if d_F == 0:
        d_Dx = 1
        ax.set_ylim(( min(Fmin)-d_Dx*0.1, max(Fmax)+d_Dx*0.1))
    if top_plot[0] == "E":
        top_ylabel = r"$"+"/".join(top_plot) +"$"+ ", [GeV]"
    elif top_plot[0] in ["mux", 'muy']:
        top_ylabel = r"$" + "/".join(top_plot) + "$" + ", [rad]"
    else:
        top_ylabel = r"$"+"/".join(top_plot) +"$"+ ", [m]"

    yticks = ax.get_yticks()
    yticks = yticks[2::2]
    ax.set_yticks(yticks)

    ax.set_ylabel(top_ylabel, fontsize=font_size)
    ax.tick_params(axis='both', labelsize=font_size)

    leg2 = ax.legend(loc='upper right', shadow=False, fancybox=True, prop=font_manager.FontProperties(size=font_size))
    leg2.get_frame().set_alpha(0.2) 

def plot_betas(ax, S, beta_x, beta_y, font_size):
    ax.set_ylabel(r"$\beta_{x,y}$ [m]", fontsize=font_size)
    ax.plot(S, beta_x, 'b', lw=2, label=r"$\beta_{x}$")
    ax.plot(S, beta_y, 'r', lw=2, label=r"$\beta_{y}$")
    ax.tick_params(axis='both', labelsize=font_size)
    leg = ax.legend(loc='upper left', shadow=False, fancybox=True, prop=font_manager.FontProperties(size=font_size))
    leg.get_frame().set_alpha(0.2) 

def plot_xy(ax, S, X, Y, font_size):
    ax.set_ylabel(r"$X, Y$, m")
    ax.plot(S, X,'r', lw = 2, label=r"$X$")
    ax.plot(S, Y,'b', lw = 2, label=r"$Y$")
    leg = ax.legend(loc='upper right', shadow=True, fancybox=True, prop=font_manager.FontProperties(size=font_size))
    leg.get_frame().set_alpha(0.5) 

def test_fontinfo():
    import matplotlib.font_manager as font_manager
    import matplotlib.ft2font as ft2font
    fontpath = font_manager.findfont("Bitstream Vera Sans")
    font = ft2font.FT2Font(fontpath)
    table = font.get_sfnt_table("head")
    assert table['version'] == (1, 0) 

def test_afm_kerning():
    from matplotlib.afm import AFM
    from matplotlib.font_manager import findfont

    fn = findfont("Helvetica", fontext="afm")
    with open(fn, 'rb') as fh:
        afm = AFM(fh)
    assert afm.string_width_height('VAVAVAVAVAVA') == (7174.0, 718) 

def test_fontinfo():
    import matplotlib.font_manager as font_manager
    import matplotlib.ft2font as ft2font
    fontpath = font_manager.findfont("DejaVu Sans")
    font = ft2font.FT2Font(fontpath)
    table = font.get_sfnt_table("head")
    assert table['version'] == (1, 0) 

def test_afm_kerning():
    from matplotlib.afm import AFM
    from matplotlib.font_manager import findfont

    fn = findfont("Helvetica", fontext="afm")
    with open(fn, 'rb') as fh:
        afm = AFM(fh)
    assert afm.string_width_height('VAVAVAVAVAVA') == (7174.0, 718) 

def test_text_size_binding():
    from matplotlib.font_manager import FontProperties

    matplotlib.rcParams['font.size'] = 10
    fp = FontProperties(size='large')
    sz1 = fp.get_size_in_points()
    matplotlib.rcParams['font.size'] = 100

    assert sz1 == fp.get_size_in_points() 

def get_chart_font():
    names = [f.name for f in matplotlib.font_manager.fontManager.ttflist]

    if DEFAULT_WORD_FONT not in names:
        return DEFAULT_WORD_FONT_FALLBACK
    return DEFAULT_WORD_FONT 

def test_fontinfo():
    import matplotlib.font_manager as font_manager
    import matplotlib.ft2font as ft2font
    fontpath = font_manager.findfont("DejaVu Sans")
    font = ft2font.FT2Font(fontpath)
    table = font.get_sfnt_table("head")
    assert table['version'] == (1, 0) 

def test_afm_kerning():
    from matplotlib.afm import AFM
    from matplotlib.font_manager import findfont

    fn = findfont("Helvetica", fontext="afm")
    with open(fn, 'rb') as fh:
        afm = AFM(fh)
    assert afm.string_width_height('VAVAVAVAVAVA') == (7174.0, 718) 

def test_text_size_binding():
    from matplotlib.font_manager import FontProperties

    matplotlib.rcParams['font.size'] = 10
    fp = FontProperties(size='large')
    sz1 = fp.get_size_in_points()
    matplotlib.rcParams['font.size'] = 100

    assert sz1 == fp.get_size_in_points() 

def test_fontinfo():
    import matplotlib.font_manager as font_manager
    import matplotlib.ft2font as ft2font
    fontpath = font_manager.findfont("DejaVu Sans")
    font = ft2font.FT2Font(fontpath)
    table = font.get_sfnt_table("head")
    assert table['version'] == (1, 0) 

def test_afm_kerning():
    from matplotlib.afm import AFM
    from matplotlib.font_manager import findfont

    fn = findfont("Helvetica", fontext="afm")
    with open(fn, 'rb') as fh:
        afm = AFM(fh)
    assert afm.string_width_height('VAVAVAVAVAVA') == (7174.0, 718) 

def test_text_size_binding():
    from matplotlib.font_manager import FontProperties

    matplotlib.rcParams['font.size'] = 10
    fp = FontProperties(size='large')
    sz1 = fp.get_size_in_points()
    matplotlib.rcParams['font.size'] = 100

    assert sz1 == fp.get_size_in_points() 

def plot_opt_func_reduced(lat, tws, top_plot=["Dx"], legend=True, fig_name=None, grid=False, font_size=18):
    """
    function for plotting: lattice (bottom section), vertical and horizontal beta-functions (middle section),
    other parameters (top section) such as "Dx", "Dy", "E", "mux", "muy", "alpha_x", "alpha_y", "gamma_x", "gamma_y"
    lat - MagneticLattice,
    tws - list if Twiss objects,
    top_plot=["Dx"] - parameters which displayed in top section. Example top_plot=["Dx", "Dy", "alpha_x"]
    legend=True - displaying legend of element types in bottom section,
    fig_name=None - name of figure,
    grid=True - grid
    font_size=18 - font size.
    """
    if fig_name == None:
        fig = plt.figure()
    else:
        fig = plt.figure(fig_name)

    plt.rc('axes', grid=grid)
    plt.rc('grid', color='0.75', linestyle='-', linewidth=0.5)
    left, width = 0.1, 0.85

    rect1 = [left, 0.63, width, 0.3]
    rect2 = [left, 0.20, width, 0.43]
    rect3 = [left, 0.10, width, 0.10]

    ax_top = fig.add_axes(rect1)
    ax_b = fig.add_axes(rect2, sharex=ax_top)  # left, bottom, width, height
    ax_el = fig.add_axes(rect3, sharex=ax_top)
    for ax in ax_b, ax_el, ax_top:
        if ax != ax_el:
            for label in ax.get_xticklabels():
                label.set_visible(False)

    ax_b.grid(grid)
    ax_top.grid(grid)
    ax_el.set_yticks([])
    ax_el.grid(grid)

    fig.subplots_adjust(hspace=0)
    beta_x = [p.beta_x for p in tws]  # list(map(lambda p:p.beta_x, tws))
    beta_y = [p.beta_y for p in tws]  # list(map(lambda p:p.beta_y, tws))
    D_x = [p.Dx for p in tws]  # list(map(lambda p:p.beta_x, tws))
    D_y = [p.Dy for p in tws]  # list(map(lambda p:p.beta_y, tws))
    S = [p.s for p in tws]  # list(map(lambda p:p.s, tws))

    plt.xlim(S[0], S[-1])

    ax_top.set_ylabel(r"$D_{x,y}$ [m]")
    ax_top.plot(S, D_x, 'b', lw=2, label=r"$D_{x}$")
    ax_top.plot(S, D_y, 'r', lw=2, label=r"$D_{y}$")
    leg = ax_top.legend(loc='upper left', shadow=False, fancybox=True, prop=font_manager.FontProperties(size=font_size))
    leg.get_frame().set_alpha(0.2)

    plot_betas(ax_b, S, beta_x, beta_y, font_size)
    plot_elems(fig, ax_el, lat, s_point=S[0], legend=legend, y_scale=0.8) 

def plot_init(self, name, fig_specs=None, save=False):
        
        #add a figure with a single subplot
        
        if save==True:
            
            import matplotlib
            matplotlib.use('Agg') # non-interactive backend
        
        import matplotlib.pyplot as plt
    
        from matplotlib.font_manager import FontProperties
    
        fontP = FontProperties()
        fontP.set_size('small')
        self.colors = ['-r','-b','-m','-g']
            
        if self.fig==None:
            
            self.fig = plt.figure(figsize=(8,4))
        
            if fig_specs != None:
                # fig_spec is a dictionary of fig adjust specs
                self.fig.subplots_adjust(**fig_sepcs)
            
            else:
            
                self.fig.subplots_adjust(left = 0.15, bottom = 0.07,
            	                    right = 0.94, top = 0.94,
            	                    hspace = 0.14, wspace=0.20)
                        
        if type(name) != str:
            raise TypeError('name should be a string')  
            
        layout = 'grid'
        n = len(self.fig.axes)
    
        if layout in ('h', 'horizontal'):
            n_rows, n_cols = (1, n+1)   
        elif layout in ('v', 'vertical'):
            n_rows, n_cols = (n+1, 1)  
        elif layout in ('g', 'grid'):
            vector_length=n+1
            n_cols = int(np.ceil(np.sqrt(vector_length)))
            n_rows = int(np.ceil(vector_length/n_cols))
        else:
            raise ValueError('Bad layout Value')
    
        for i in range(n):
            self.fig.axes[i].change_geometry(n_rows, n_cols, i+1)
            
        self.figsaxe[name] = self.fig.add_subplot(n_rows, n_cols, n+1)