oeasy-python-tutorial/md2/0721/0721.md at main · overmind1980/oeasy-python-tutorial

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---
- oeasy Python 0721
- 这是 oeasy 系统化 Python 教程，从基础一步步讲，扎实、完整、不跳步。愿意花时间学，就能真正学会。
- 本教程同步发布在： 
	- 个人网站： `https://oeasy.org` 
	- 蓝桥云课： `https://www.lanqiao.cn/courses/3584` 
	- GitHub： `https://github.com/overmind1980/oeasy-python-tutorial` 
	- Gitee： `https://gitee.com/overmind1980/oeasypython` 
---

基础的csv文件

2024,2
2025,3
2026,3.5

读取csv

filename = r"/home/shiyanlou/data.csv"
with open(filename) as f:
    lines = f.readlines()
    for line in lines:
        line = line.replace("\n","")
        year, num = line.split(",")
        print(year,num,sep=":")

更有结构化

filename = r"/home/shiyanlou/data.csv"
data = dict()
with open(filename) as f:
    for index,line in enumerate(f.readlines()):
        line = line.replace("\n","")
        year, num = line.split(",")
        data[index] ={
            "label" : year,
            "num" : num
        }
print(data)

生成柱形图

import bpy

filename = r"/home/shiyanlou/data.csv"
data = dict()
with open(filename) as f:
    for index,line in enumerate(f.readlines()):
        line = line.replace("\n","")
        year, num = line.split(",")
        data[index] ={
            "label" : year,
            "num" : num
        }

### clean the scene
for obj in bpy.data.objects:
    bpy.data.objects.remove(obj)

### Visualize data
for index in data:
    bpy.ops.mesh.primitive_cube_add(size=1)
    bpy.context.object.location = (0, index * 2, 0)
    value = float(data[index]["num"])
    bpy.context.object.scale = (1, 1, value)

执行结果

需要放在xy平面以上

生成柱形图

import bpy

filename = r"/home/shiyanlou/data.csv"
data = dict()
with open(filename) as f:
    for index,line in enumerate(f.readlines()):
        line = line.replace("\n","")
        year, num = line.split(",")
        data[index] ={
            "label" : year,
            "num" : num
        }

### clean the scene
for obj in bpy.data.objects:
    bpy.data.objects.remove(obj)

### Visualize data
for index in data:
    bpy.ops.mesh.primitive_cube_add(size=1)
    bpy.context.object.location = (0, index * 2, height/2)
    value = float(data[index]["num"])
    bpy.context.object.scale = (1, 1, value)

执行结果

添加标签


import bpy

filename = r"/home/shiyanlou/data.csv"
data = dict()
with open(filename) as f:
    for index,line in enumerate(f.readlines()):
        line = line.replace("\n","")
        year, num = line.split(",")
        data[index] ={
            "label" : year,
            "num" : num
        }
 
### clean the scene
for obj in bpy.data.objects:
    bpy.data.objects.remove(obj)

### Visualize data
for index in data:
    ### create the bar
    height = float(data[index]["num"])
    bpy.ops.mesh.primitive_cube_add(size=1)
    bpy.context.object.location = (0, index * 2, height/2)
    bpy.context.object.scale = (1, 1, height)
    ### lable the bar
    lable = data[index]["label"]
    bpy.ops.object.text_add(enter_editmode=True)
    bpy.context.object.location = (0.6, index *2, 0)
    bpy.ops.font.delete(type="PREVIOUS_WORD") 
    bpy.ops.font.text_insert(text=lable)
    bpy.ops.object.editmode_toggle()

标签出现

尝试给标签添加一点厚度

添加厚度

import bpy

filename = r"/home/shiyanlou/data.csv"
data = dict()
with open(filename) as f:
    for index,line in enumerate(f.readlines()):
        line = line.replace("\n","")
        year, num = line.split(",")
        data[index] ={
            "label" : year,
            "num" : num
        }
 
### clean the scene
for obj in bpy.data.objects:
    bpy.data.objects.remove(obj)

### Visualize data
for index in data:
    ### create the bar
    height = float(data[index]["num"])
    bpy.ops.mesh.primitive_cube_add(size=1)
    bpy.context.object.location = (0, index * 2, height/2)
    bpy.context.object.scale = (1, 1, height)
    ### lable the bar
    lable = data[index]["label"]
    bpy.ops.object.text_add(enter_editmode=True)
    bpy.context.object.location = (0.6, index *2, 0)
    bpy.ops.font.delete(type="PREVIOUS_WORD") 
    bpy.ops.font.text_insert(text=lable)
    bpy.ops.object.editmode_toggle()
    bpy.context.object.data.bevel_depth = 0.1

标签变厚了

侧面标签

import bpy

filename = r"/home/shiyanlou/data.csv"
data = dict()
with open(filename) as f:
    for index,line in enumerate(f.readlines()):
        line = line.replace("\n","")
        year, num = line.split(",")
        data[index] ={
            "label" : year,
            "num" : num
        }

### clean the scene
for obj in bpy.data.objects:
    bpy.data.objects.remove(obj)

### Visualize data
for index in data:
    ### create the bar
    height = float(data[index]["num"])
    bpy.ops.mesh.primitive_cube_add(size=1)
    bpy.context.object.location = (0, index * 2, height/2)
    bpy.context.object.scale = (1, 1, height)
    ### lable the bar
    lable = data[index]["label"]
    bpy.ops.object.text_add(enter_editmode=True)
    bpy.context.object.location = (0.6, index *2, 0)
    bpy.ops.font.delete(type="PREVIOUS_WORD")
    bpy.ops.font.text_insert(text=lable)
    bpy.ops.object.editmode_toggle()
    bpy.context.object.data.bevel_depth = 0.1

###visualize the data
# Label z axis
amount_of_ticks = 5
for i in range (amount_of_ticks):
    # Put a cube
    bpy.ops.mesh.primitive_cube_add(size=1, location=(0, -1, i))
    bpy.context.object.scale = (1, 1, 0.1)

侧面出现刻度

侧面刻度参数化

import bpy

filename = r"/home/shiyanlou/data.csv"
data = dict()
with open(filename) as f:
    for index,line in enumerate(f.readlines()):
        line = line.replace("\n","")
        year, num = line.split(",")
        data[index] ={
            "label" : year,
            "num" : num
        }

### clean the scene
for obj in bpy.data.objects:
    bpy.data.objects.remove(obj)

### Visualize data
for index in data:
    ### create the bar
    height = float(data[index]["num"])
    bpy.ops.mesh.primitive_cube_add(size=1)
    bpy.context.object.location = (0, index * 2, height/2)
    bpy.context.object.scale = (1, 1, height)
    ### lable the bar
    lable = data[index]["label"]
    bpy.ops.object.text_add(enter_editmode=True)
    bpy.context.object.location = (0.6, index *2, 0)
    bpy.ops.font.delete(type="PREVIOUS_WORD")
    bpy.ops.font.text_insert(text=lable)
    bpy.ops.object.editmode_toggle()
    bpy.context.object.data.bevel_depth = 0.1

###visualize the data
# Label z axis
amount_of_ticks = 5
thickness_of_ticks = 0.1
offset_of_ticks = 1
for i in range (amount_of_ticks):
    # Put a cube
    bpy.ops.mesh.primitive_cube_add(size=1, location=(0, -offset_of_ticks, i))
    bpy.context.object.scale = (1, 1, thickness_of_ticks)

添加标签

import bpy

filename = r"/home/shiyanlou/data.csv"
data = dict()
with open(filename) as f:
    for index,line in enumerate(f.readlines()):
        line = line.replace("\n","")
        year, num = line.split(",")
        data[index] ={
            "label" : year,
            "num" : num
        }

### clean the scene
for obj in bpy.data.objects:
    bpy.data.objects.remove(obj)

### Visualize data
for index in data:
    ### create the bar
    height = float(data[index]["num"])
    bpy.ops.mesh.primitive_cube_add(size=1)
    bpy.context.object.location = (0, index * 2, height/2)
    bpy.context.object.scale = (1, 1, height)
    ### lable the bar
    lable = data[index]["label"]
    bpy.ops.object.text_add(enter_editmode=True)
    bpy.context.object.location = (0.6, index *2, 0)
    bpy.ops.font.delete(type="PREVIOUS_WORD")
    bpy.ops.font.text_insert(text=lable)
    bpy.ops.object.editmode_toggle()
    bpy.context.object.data.bevel_depth = 0.1

###visualize the data
# Label z axis
amount_of_ticks = 5
thickness_of_ticks = 0.1
offset_of_ticks = 1
for i in range (amount_of_ticks):
    # Put a cube
    bpy.ops.mesh.primitive_cube_add(size=1, location=(0, -offset_of_ticks, i))
    bpy.context.object.scale = (1, 1, thickness_of_ticks)
    # Put a number
    number_pos_z = i + thickness_of_ticks/2
    value_as_str = str(i)
    bpy.ops.object.text_add(enter_editmode=True)
    bpy.context.object.location = (0, -2, number_pos_z)
    bpy.context.object.rotation_euler = (1.57, 0, 1.57)
    bpy.ops.font.delete(type='PREVIOUS_WORD')
    bpy.ops.font.text_insert(text=value_as_str)
    bpy.ops.object.editmode_toggle()
    bpy.context.object.data.bevel_depth = 0.1

z轴坐标数值出现

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基础的csv文件

读取csv

更有结构化

生成柱形图

生成柱形图

添加标签

添加厚度

侧面标签

侧面刻度参数化

添加标签

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基础的csv文件

读取csv

更有结构化

生成柱形图

生成柱形图

添加标签

添加厚度

侧面标签

侧面刻度参数化

添加标签