>>> A or B True >>> not A False >>> >>> >>> A = False >>> B = True >>> A and B False >>> A or B True >>> not A True >>> >>> A = False >>> B = False >>> A and B False >>> A or B False >>> not A True 2.3.6 集合(Set),元组(Tuple),空值(None)...
>>> s = set([1, 'abc', 1.5]) # 用列表创建集合 >>> s {1, 'abc', 1.5} >>> s = set((1, 'abc', 1.5)) # 用元组创建集合 >>> s {1, 'abc', 1.5} >>> s = set({'a':1, 'b':2, 'c':3}) # 用字典创建集合 >>> s # 只会包含字典中的键 {'c', 'b', 'a'...
print(stus[::2])# ['牛魔王', '红孩儿', 'sda', '蜘蛛精'],指定步长,切片中元素个数为 4 # stus[::2] = ['牛魔王', '红孩儿', '二郎神'] # 报错,序列中元素只有 3 个,ValueError: attempt to assign sequence of size 3 to extended slice of size 4 # 通过切片来删除元素 delstus[0:2]...
# -1 means infer size from the rest of dimensions. x = x.reshape((0, -1)) x = F.tanh(self.fc1(x)) x = F.tanh(self.fc2(x)) return xnet = Net()# 初始化与优化器定义# set the context on GPU is available otherwise CPUctx = [mx.g...
[0].set_title('Correct correspondences', size=20) outlier_idxs = np.nonzero(outliers)[0] plot_matches(axes[1], image_original_gray, image_warped_gray, source, destination, np.column_stack((outlier_idxs, outlier_idxs)), matches_color='row') axes[1].axis('off'), axes[1].set_...
(encoding= 'ascii')# 创建新的sheet表worksheet = workbook.add_sheet("My new Sheet")# 往表格写入内容worksheet.write(0,0, "内容1") worksheet.write(2,1, "内容2")# 设置行高style = xlwt.easyxf('font:height 360;')# 18pt,类型小初的字号row = worksheet.row(0) row.set_style(style)# ...
(file_path, "rb") as attachment:part = MIMEBase('application', 'octet-stream')part.set_payload(attachment.read())encoders.encode_base64(part)part.add_header('Content-Disposition', f"attachment; filename= {file_path}")message...
4、list、tuple、dict、set详细内容见day04 二、int、bool、str常用方法 基本数据类型的常用方法都可以在builtins.py中找到详细注释,可作参考(pycharm中按ctrl+左键进入源码) 1、int int(object) 将object转为int bit_length() 获取int转成二进制后的最小表示位数 ...
file_path = raw_file_path.decode("utf16").strip("\x00")return{'file_size': file_size,'file_path': file_path,'deleted_time': deleted_time} 我们的sizeof_fmt()函数是从StackOverflow.com借来的,这是一个充满了许多编程问题解决方案的网站。虽然我们可以自己起草,但这段代码对我们的目的来说形式良...
import circlifyimport matplotlib.pyplot as plt# 创建画布, 包含一个子图fig, ax = plt.subplots(figsize=(14, 14))# 标题ax.set_title('Repartition of the world population')# 移除坐标轴ax.axis('off')# 人口数据data = [{'id': 'World', 'datum': 6964195249, 'children': [{'id': "North...