AI代码解释 >>>from web3.autoimportw3>>>block_hash=w3.eth.getBlock(4359745).hashHexBytes('0x03087766bf68e78671d1ea436ae087da74a12761dac020011a9eddc4900bf13b')#getthe first byte:>>>block_hash[0]3# show how many bytes areinthe hash>>>len(block_hash)32# hex-encode the hash>>>w3.t...
import pandas as pdfuncs = [_ for _ in dir(pd) if not _.startswith('_')]types = type(pd.DataFrame), type(pd.array), type(pd)Names = 'Type','Function','Module','Other'Types = {}for f in funcs:t = type(eval("pd."+f))t = Names[-1 if t not in types else types.inde...
Visit the '+'data table notebook'+' to learn more about interactive tables.';element.innerHTML='';dataTable['output_type']='display_data';awaitgoogle.colab.output.renderOutput(dataTable,element);constdocLink=document.createElement('div');docLink.innerHTML=docLinkHtml;element.appendChild(docLink...
DataFrame.to_period([freq, axis, copy]) #Convert DataFrame from DatetimeIndex to PeriodIndex with desired DataFrame.to_timestamp([freq, how, axis]) #Cast to DatetimeIndex of timestamps, at beginning of period DataFrame.tz_convert(tz[, axis, level, copy]) #Convert tz-aware axis to target ...
# Cast a pandas object to a specified dtype dtype. Series.astype() '''A:用Series.astype(),将电话号转成字符串''' df['tel'] = df['tel'].astype(str) type(df.at[0,'tel']) --- Out[37]: str 1. 2. 3. 4. 5. 6. 7. 8. 3.2、用str.slice()字段抽取 # 运营商 brand = df...
pivot_table(data, values='value', index='category', columns='type', aggfunc=np.sum) 数据可视化是数据分析中不可或缺的一部分。Python的matplotlib和seaborn库提供了丰富的图表类型和强大的绘图功能,可以帮助我们直观地展示数据。 示例代码: import matplotlib.pyplot as plt import seaborn as sns # 折线图 ...
>>> cast = ["John", "Eric", "Terry", "Graham", "Michael"] >>> cast[0:2] = ["Cleese", "Idle", "Gilliam"] >>> cast ['Cleese', 'Idle', 'Gilliam', 'Graham', 'Michael'] 列表还允许你使用与它们相关的特定函数调用,比如append、sort、reverse和pop。更新名单(没有双关语!list的功能...
[lib]# 编译之后的动态库的名称name="py_lib"# 表示编译成一个和 C 语言二进制接口(ABI)兼容的动态链接库crate-type=["cdylib"] 1. 2. 3. 4. 5. cdylib 表示生成动态库,如果想生成静态库,那么就指定为 staticlib。 下面开始编写源代码,在生成项目之后,src 目录下会有一个 lib.rs,它是整个库的入口...
前言 在数据处理过程中,我们有时需要将数据类型进行强制转换。例如做整数加法时,我们需要将所有变量类型转换为整型。本节中我们介绍三种数据类型转换方式,分别为整型(int),浮点...
DataFrame.resample(rule[, how, axis, …])Convenience method for frequency conversion and resampling of time series. DataFrame.to_period([freq, axis, copy])Convert DataFrame from DatetimeIndex to PeriodIndex with desired DataFrame.to_timestamp([freq, how, axis, copy])Cast to DatetimeIndex of time...