def sign(x): if x > 0: return 'positive' elif x < 0: return 'negative' else: return 'zero' for x in [-1, 0, 1]: print(sign(x)) # 依次打印 # negative # zero # positive 经常定义函数来接受可选的关键字参数,如下所示: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 def ...
# 添加共用的颜色条cbar_ax = fig.add_axes([0.92, 0.15, 0.02, 0.7])sm = plt.cm.ScalarMappable(cmap='viridis', norm=plt.Normalize(vmin=0, vmax=np.max([cm_without_norm, cm_with_norm])))fig.colorbar(sm, cax=c...
NumPy Array - Replace -inf with zero valueTo replace -inf with zero value, we will use numpy.isneginf() method which is used to return a boolean value as True if the negative infinity value is present. Hence, we will check where -inf is present and assign 0 at that position....
代码语言:javascript 代码运行次数:0 运行 AI代码解释 ``` # Python script to find and replace text in a file def find_replace(file_path, search_text, replace_text): with open(file_path, 'r') as f: text = f.read() modified_text = text.replace(search_text, replace_text) with open(...
'lstrip', 'maketrans', 'partition', 'removeprefix', 'removesuffix', 'replace', 'rfind', 'rindex', 'rjust', 'rpartition', 'rsplit', 'rstrip', 'split', 'splitlines', 'startswith', 'strip', 'swapcase', 'title', 'translate', 'upper', 'zfill'] ...
完整文件示例# This is a sample Python script.# Press ⌃R to execute it or replace it with ...
if i < 0: print("Your number was negative.") elif i > 0: print("Your number was positive.") else: print("It seems your number was zero.") else分支是可选的,也可以是零,一个或多个elif分支。 函数,类和方法 Python允许使用方法定义函数和类。具有方法的类基本上类似于ST中的功能块,或者类...
这个叫做 否定型后视断言(negative lookbehind assertion)。类似于肯定型后视断言,内部表达式(匹配的内容)必须是固定长度的。以否定型后视断言开头的正则表达式,匹配项可能位于搜索字符串的开头。 (?(id/name)yes-pattern|no-pattern) 如果给定的 id 或name 存在,将会尝试匹配 yes-pattern ,否则就尝试匹配 no-...
with语句 Step.8 其他类型 模块 class 实例 函数 方法 代码 object对象 type对象 ellipsis(省略号) notimplemented NO.4 魔法函数 Python中的魔法函数使用双下划线开始,以双下划线结尾。关于详细介绍请看我的文章——《全面总结Python中的魔法函数》。 No.5 鸭子类型与白鹅类型 ...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 In [21]: s2 = ' xie xiao jun ' In [22]: s2 Out[22]: ' xie xiao jun ' In [23]: s2.st s2.startswith s2.strip In [23]: s2.strip() Out[23]: 'xie xiao jun' In [24]: s2.r s2.replace s2.rindex s2.rpartition s2.rstri...