python 设置字体

import tkinter as tk
from tkinter import font

root = tk.Tk()

# 创建一个字体对象
custom_font = font.Font(family="Helvetica", size=12, weight="bold")

# 使用字体对象创建一个标签
label = tk.Label(root, text="Hello, World!", font=custom_font)
label.pack()

root.mainloop()

import matplotlib.pyplot as plt
import matplotlib.font_manager as fm

# 设置全局字体
plt.rcParams['font.family'] = 'SimHei'  # 使用黑体
plt.rcParams['axes.unicode_minus'] = False  # 解决负号'-'显示为方块的问题

# 或者为特定元素设置字体
fig, ax = plt.subplots()
ax.set_title('标题', fontname='SimHei', fontsize=14)
ax.set_xlabel('X轴', fontname='SimHei', fontsize=12)
ax.set_ylabel('Y轴', fontname='SimHei', fontsize=12)

plt.show()

from PyQt5.QtWidgets import QApplication, QLabel
from PyQt5.QtGui import QFont

app = QApplication([])

label = QLabel("Hello, World!")
font = QFont("Arial", 12, QFont.Bold)
label.setFont(font)

label.show()
app.exec_()

from reportlab.pdfgen import canvas
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.platypus import Paragraph

c = canvas.Canvas("hello.pdf")
styles = getSampleStyleSheet()
style = styles["Normal"]
style.fontName = "Helvetica"
style.fontSize = 12

p = Paragraph("Hello, World!", style)
p.wrapOn(c, 500, 500)
p.drawOn(c, 100, 750)

c.save()