fix: add explicit font_manager import and update stale URLs (#24)

mmcky · web-flow · commit 7b3fc41d100c · 2026-04-11T17:02:21.000+10:00
- Add 'import matplotlib.font_manager' to all 18 lectures that use
  mpl.font_manager.fontManager.addfont(). Newer matplotlib versions
  use lazy loading, so the font_manager submodule must be explicitly
  imported before access.

- Update stale CSV URLs in pandas.md and python_advanced_features.md
  from master/source/_static/ to main/lectures/_static/ to match the
  current upstream repo structure.
diff --git a/lectures/about_py.md b/lectures/about_py.md
@@ -316,6 +316,7 @@ a
 ```{code-cell} python3
 import numpy as np                     # 加载库
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/debugging.md b/lectures/debugging.md
@@ -72,6 +72,7 @@ Python 的调试工具因平台、集成开发环境和编辑器的不同而有
 import numpy as np
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/functions.md b/lectures/functions.md
@@ -62,6 +62,7 @@ translation:
 import numpy as np
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/jax_intro.md b/lectures/jax_intro.md
@@ -86,6 +86,7 @@ import quantecon as qe
 ```{code-cell} ipython3
 import jax.numpy as jnp
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/matplotlib.md b/lectures/matplotlib.md
@@ -77,6 +77,7 @@ Matplotlib 的独特之处在于它提供了两种不同的绘图接口。
 import matplotlib.pyplot as plt
 import numpy as np
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/need_for_speed.md b/lectures/need_for_speed.md
@@ -95,6 +95,7 @@ import numpy as np
 import quantecon as qe
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/numba.md b/lectures/numba.md
@@ -54,6 +54,7 @@ import numpy as np
 import quantecon as qe
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/numpy.md b/lectures/numpy.md
@@ -82,6 +82,7 @@ import random
 import quantecon as qe
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/numpy_vs_numba_vs_jax.md b/lectures/numpy_vs_numba_vs_jax.md
@@ -73,6 +73,7 @@ import numpy as np
 import quantecon as qe
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/pandas.md b/lectures/pandas.md
@@ -82,6 +82,7 @@ import pandas as pd
 import numpy as np
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 import requests
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
@@ -179,7 +180,7 @@ s
 我们将使用 `pandas` 函数 `read_csv` 从 URL 读取数据。
 
 ```{code-cell} ipython3
-df = pd.read_csv('https://raw.githubusercontent.com/QuantEcon/lecture-python-programming/master/source/_static/lecture_specific/pandas/data/test_pwt.csv')
+df = pd.read_csv('https://raw.githubusercontent.com/QuantEcon/lecture-python-programming/main/lectures/_static/lecture_specific/pandas/data/test_pwt.csv')
 type(df)
 ```
 
diff --git a/lectures/pandas_panel.md b/lectures/pandas_panel.md
@@ -47,6 +47,7 @@ translation:
 ```{code-cell} ipython3
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/python_advanced_features.md b/lectures/python_advanced_features.md
@@ -377,6 +377,7 @@ print(*l1)
 import numpy as np
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
@@ -1195,7 +1196,7 @@ sum(draws)
 :label: paf_ex1
 ```
 
-完成以下代码，并使用[此 csv 文件](https://raw.githubusercontent.com/QuantEcon/lecture-python-programming/master/source/_static/lecture_specific/python_advanced_features/test_table.csv)进行测试，我们假设你已将该文件放在当前工作目录中：
+完成以下代码，并使用[此 csv 文件](https://raw.githubusercontent.com/QuantEcon/lecture-python-programming/main/lectures/_static/lecture_specific/python_advanced_features/test_table.csv)进行测试，我们假设你已将该文件放在当前工作目录中：
 
 ```{code-block} python3
 :class: no-execute
diff --git a/lectures/python_by_example.md b/lectures/python_by_example.md
@@ -79,6 +79,7 @@ translation:
 import numpy as np
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/python_oop.md b/lectures/python_oop.md
@@ -77,6 +77,7 @@ Python 通过提供**类定义**使这一切变得容易。
 import numpy as np
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/scipy.md b/lectures/scipy.md
@@ -150,6 +150,7 @@ f(x; a, b) = \frac{x^{(a - 1)} (1 - x)^{(b - 1)}}
 from scipy.stats import beta
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/sympy.md b/lectures/sympy.md
@@ -76,6 +76,7 @@ from sympy.stats import Poisson, Exponential, Binomial, density, moment, E, cdf
 import numpy as np
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
diff --git a/lectures/workspace.md b/lectures/workspace.md
@@ -72,6 +72,7 @@ Python 文件用于编写较长的、可复用的代码块——按照惯例，
 
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 import numpy as np
 
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
diff --git a/lectures/writing_good_code.md b/lectures/writing_good_code.md
@@ -88,6 +88,7 @@ k_{t+1} = s k_t^{\alpha} + (1 - \delta) k_t,
 import numpy as np
 import matplotlib.pyplot as plt
 import matplotlib as mpl  # i18n
+import matplotlib.font_manager  # i18n
 FONTPATH = "_fonts/SourceHanSerifSC-SemiBold.otf"  # i18n
 mpl.font_manager.fontManager.addfont(FONTPATH)  # i18n
 mpl.rcParams['font.family'] = ['Source Han Serif SC']  # i18n
